Added an "init" message in LLPLUGIN_MESSAGE_CLASS_MEDIA, and made LLPluginClassMedia queue it up before initializing its LLPluginProcessParent.

Made all existing plugins send their texture_params message from this init message instead of the LLPLUGIN_MESSAGE_CLASS_BASE "init" message.  (This ensures that they won't start to receive 'size_change' messages until after the init has happened.)
Added "set_user_data_path" and "set_language_code" messages to LLPluginClassMedia.
Made webkit plugin deal with the new messages, when they're sent before it receives the media "init".
Removed the user_data_path and language_code arguments from the init function calls throughout the hierarchy.
Made LLViewerMediaImpl queue up the language code and user data path messages before initializing the media.

Reviewed by Callum at http://codereview.lindenlab.com/687006 .

12 files changed, 268 insertions, 204 deletions

diff --git a/indra/llplugin/llpluginclassmedia.cpp b/indra/llplugin/llpluginclassmedia.cpp
index d48f4ad0f5..cb62e46271 100644
--- a/indra/llplugin/llpluginclassmedia.cpp
+++ b/indra/llplugin/llpluginclassmedia.cpp
@@ -65,15 +65,19 @@ LLPluginClassMedia::~LLPluginClassMedia()
 	reset();
 }
 
-bool LLPluginClassMedia::init(const std::string &launcher_filename, const std::string &plugin_filename, bool debug, const std::string &user_data_path, const std::string &language_code)
+bool LLPluginClassMedia::init(const std::string &launcher_filename, const std::string &plugin_filename, bool debug)
 {	
 	LL_DEBUGS("Plugin") << "launcher: " << launcher_filename << LL_ENDL;
 	LL_DEBUGS("Plugin") << "plugin: " << plugin_filename << LL_ENDL;
-	LL_DEBUGS("Plugin") << "user_data_path: " << user_data_path << LL_ENDL;
 	
 	mPlugin = new LLPluginProcessParent(this);
 	mPlugin->setSleepTime(mSleepTime);
-	mPlugin->init(launcher_filename, plugin_filename, debug, user_data_path,language_code);
+	
+	// Queue up the media init message -- it will be sent after all the currently queued messages.
+	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "init");
+	sendMessage(message);
+	
+	mPlugin->init(launcher_filename, plugin_filename, debug);
 
 	return true;
 }
@@ -678,6 +682,20 @@ void LLPluginClassMedia::paste()
 	sendMessage(message);
 }
 
+void LLPluginClassMedia::setUserDataPath(const std::string &user_data_path)
+{
+	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "set_user_data_path");
+	message.setValue("path", user_data_path);
+	sendMessage(message);
+}
+
+void LLPluginClassMedia::setLanguageCode(const std::string &language_code)
+{
+	LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "set_language_code");
+	message.setValue("language", language_code);
+	sendMessage(message);
+}
+
 LLPluginClassMedia::ETargetType getTargetTypeFromLLQtWebkit(int target_type)
 {
 	// convert a LinkTargetType value from llqtwebkit to an ETargetType
diff --git a/indra/llplugin/llpluginclassmedia.h b/indra/llplugin/llpluginclassmedia.h
index ce49241e84..6318c67f12 100644
--- a/indra/llplugin/llpluginclassmedia.h
+++ b/indra/llplugin/llpluginclassmedia.h
@@ -51,9 +51,7 @@ public:
 	// local initialization, called by the media manager when creating a source
 	virtual bool init(const std::string &launcher_filename, 
 					  const std::string &plugin_filename, 
-					  bool debug, 
-					  const std::string &user_data_path,
-					  const std::string &language_code);
+					  bool debug);
 
 	// undoes everything init() didm called by the media manager when destroying a source
 	virtual void reset();
@@ -177,6 +175,10 @@ public:
 
 	void	paste();
 	bool	canPaste() const { return mCanPaste; };
+	
+	// These can be called before init(), and they will be queued and sent before the media init message.
+	void	setUserDataPath(const std::string &user_data_path);
+	void	setLanguageCode(const std::string &language_code);
 		
 	///////////////////////////////////
 	// media browser class functions
diff --git a/indra/llplugin/llpluginprocesschild.cpp b/indra/llplugin/llpluginprocesschild.cpp
index 9b43ec0e3e..ccaf95b36d 100644
--- a/indra/llplugin/llpluginprocesschild.cpp
+++ b/indra/llplugin/llpluginprocesschild.cpp
@@ -155,8 +155,6 @@ void LLPluginProcessChild::idle(void)
 				{
 					setState(STATE_PLUGIN_INITIALIZING);
 					LLPluginMessage message("base", "init");
-					message.setValue("user_data_path", mUserDataPath);
-					message.setValue("language_code", mLanguageCode);
 					sendMessageToPlugin(message);
 				}
 			break;
@@ -329,8 +327,6 @@ void LLPluginProcessChild::receiveMessageRaw(const std::string &message)
 			if(message_name == "load_plugin")
 			{
 				mPluginFile = parsed.getValue("file");
-				mUserDataPath = parsed.getValue("user_data_path");
-				mLanguageCode = parsed.getValue("language_code");
 			}
 			else if(message_name == "shm_add")
 			{
diff --git a/indra/llplugin/llpluginprocesschild.h b/indra/llplugin/llpluginprocesschild.h
index af76ec1fa5..0e5e85406a 100644
--- a/indra/llplugin/llpluginprocesschild.h
+++ b/indra/llplugin/llpluginprocesschild.h
@@ -98,9 +98,6 @@ private:
 	
 	std::string mPluginFile;
 
-	std::string mUserDataPath;
-	std::string mLanguageCode;
-	
 	LLPluginInstance *mInstance;
 
 	typedef std::map<std::string, LLPluginSharedMemory*> sharedMemoryRegionsType;
diff --git a/indra/llplugin/llpluginprocessparent.cpp b/indra/llplugin/llpluginprocessparent.cpp
index 0ce2c759ba..895c858979 100644
--- a/indra/llplugin/llpluginprocessparent.cpp
+++ b/indra/llplugin/llpluginprocessparent.cpp
@@ -98,15 +98,12 @@ void LLPluginProcessParent::errorState(void)
 		setState(STATE_ERROR);
 }
 
-void LLPluginProcessParent::init(const std::string &launcher_filename, const std::string &plugin_filename, bool debug, const std::string &user_data_path, const std::string &language_code)
+void LLPluginProcessParent::init(const std::string &launcher_filename, const std::string &plugin_filename, bool debug)
 {	
 	mProcess.setExecutable(launcher_filename);
 	mPluginFile = plugin_filename;
 	mCPUUsage = 0.0f;
-	mDebug = debug;
-	mUserDataPath = user_data_path;
-	mLanguageCode = language_code;
-	
+	mDebug = debug;	
 	setState(STATE_INITIALIZED);
 }
 
@@ -363,8 +360,6 @@ void LLPluginProcessParent::idle(void)
 				{
 					LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_INTERNAL, "load_plugin");
 					message.setValue("file", mPluginFile);
-					message.setValue("user_data_path", mUserDataPath);
-					message.setValue("language_code", mLanguageCode);
 					sendMessage(message);
 				}
 
diff --git a/indra/llplugin/llpluginprocessparent.h b/indra/llplugin/llpluginprocessparent.h
index 23702814c8..cc6c513615 100644
--- a/indra/llplugin/llpluginprocessparent.h
+++ b/indra/llplugin/llpluginprocessparent.h
@@ -61,9 +61,7 @@ public:
 		
 	void init(const std::string &launcher_filename, 
 			  const std::string &plugin_filename, 
-			  bool debug, 
-			  const std::string &user_data_path,
-			  const std::string &language_code);
+			  bool debug);
 
 	void idle(void);
 	
@@ -148,9 +146,6 @@ private:
 	
 	std::string mPluginFile;
 
-	std::string mUserDataPath;
-	std::string mLanguageCode;
-
 	LLPluginProcessParentOwner *mOwner;
 	
 	typedef std::map<std::string, LLPluginSharedMemory*> sharedMemoryRegionsType;
diff --git a/indra/media_plugins/example/media_plugin_example.cpp b/indra/media_plugins/example/media_plugin_example.cpp
index f5b077fea0..8d79bb27f1 100644
--- a/indra/media_plugins/example/media_plugin_example.cpp
+++ b/indra/media_plugins/example/media_plugin_example.cpp
@@ -119,17 +119,6 @@ void MediaPluginExample::receiveMessage( const char* message_string )
 				std::string plugin_version = "Example media plugin, Example Version 1.0.0.0";
 				message.setValue( "plugin_version", plugin_version );
 				sendMessage( message );
-
-				// Plugin gets to decide the texture parameters to use.
-				message.setMessage( LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params" );
-				message.setValueS32( "default_width", mWidth );
-				message.setValueS32( "default_height", mHeight );
-				message.setValueS32( "depth", mDepth );
-				message.setValueU32( "internalformat", GL_RGBA );
-				message.setValueU32( "format", GL_RGBA );
-				message.setValueU32( "type", GL_UNSIGNED_BYTE );
-				message.setValueBoolean( "coords_opengl", false );
-				sendMessage( message );
 			}
 			else
 			if ( message_name == "idle" )
@@ -191,7 +180,20 @@ void MediaPluginExample::receiveMessage( const char* message_string )
 		else
 		if ( message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA )
 		{
-			if ( message_name == "size_change" )
+			if ( message_name == "init" )
+			{
+				// Plugin gets to decide the texture parameters to use.
+				message.setMessage( LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params" );
+				message.setValueS32( "default_width", mWidth );
+				message.setValueS32( "default_height", mHeight );
+				message.setValueS32( "depth", mDepth );
+				message.setValueU32( "internalformat", GL_RGBA );
+				message.setValueU32( "format", GL_RGBA );
+				message.setValueU32( "type", GL_UNSIGNED_BYTE );
+				message.setValueBoolean( "coords_opengl", false );
+				sendMessage( message );
+			}
+			else if ( message_name == "size_change" )
 			{
 				std::string name = message_in.getValue( "name" );
 				S32 width = message_in.getValueS32( "width" );
diff --git a/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp b/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp
index 26173314a7..a69da3ff5a 100644
--- a/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp
+++ b/indra/media_plugins/gstreamer010/media_plugin_gstreamer010.cpp
@@ -946,33 +946,6 @@ void MediaPluginGStreamer010::receiveMessage(const char *message_string)
 
 				message.setValue("plugin_version", getVersion());
 				sendMessage(message);
-
-				// Plugin gets to decide the texture parameters to use.
-				message.setMessage(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
-				// lame to have to decide this now, it depends on the movie.  Oh well.
-				mDepth = 4;
-
-				mCurrentWidth = 1;
-				mCurrentHeight = 1;
-				mPreviousWidth = 1;
-				mPreviousHeight = 1;
-				mNaturalWidth = 1;
-				mNaturalHeight = 1;
-				mWidth = 1;
-				mHeight = 1;
-				mTextureWidth = 1;
-				mTextureHeight = 1;
-
-				message.setValueU32("format", GL_RGBA);
-				message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV);
-
-				message.setValueS32("depth", mDepth);
-				message.setValueS32("default_width", mWidth);
-				message.setValueS32("default_height", mHeight);
-				message.setValueU32("internalformat", GL_RGBA8);
-				message.setValueBoolean("coords_opengl", true);	// true == use OpenGL-style coordinates, false == (0,0) is upper left.
-				message.setValueBoolean("allow_downsample", true); // we respond with grace and performance if asked to downscale
-				sendMessage(message);
 			}
 			else if(message_name == "idle")
 			{
@@ -1037,7 +1010,36 @@ void MediaPluginGStreamer010::receiveMessage(const char *message_string)
 		}
 		else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA)
 		{
-			if(message_name == "size_change")
+			if(message_name == "init")
+			{
+				// Plugin gets to decide the texture parameters to use.
+				LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
+				// lame to have to decide this now, it depends on the movie.  Oh well.
+				mDepth = 4;
+
+				mCurrentWidth = 1;
+				mCurrentHeight = 1;
+				mPreviousWidth = 1;
+				mPreviousHeight = 1;
+				mNaturalWidth = 1;
+				mNaturalHeight = 1;
+				mWidth = 1;
+				mHeight = 1;
+				mTextureWidth = 1;
+				mTextureHeight = 1;
+
+				message.setValueU32("format", GL_RGBA);
+				message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV);
+
+				message.setValueS32("depth", mDepth);
+				message.setValueS32("default_width", mWidth);
+				message.setValueS32("default_height", mHeight);
+				message.setValueU32("internalformat", GL_RGBA8);
+				message.setValueBoolean("coords_opengl", true);	// true == use OpenGL-style coordinates, false == (0,0) is upper left.
+				message.setValueBoolean("allow_downsample", true); // we respond with grace and performance if asked to downscale
+				sendMessage(message);
+			}
+			else if(message_name == "size_change")
 			{
 				std::string name = message_in.getValue("name");
 				S32 width = message_in.getValueS32("width");
diff --git a/indra/media_plugins/quicktime/media_plugin_quicktime.cpp b/indra/media_plugins/quicktime/media_plugin_quicktime.cpp
index e230fcc280..1f88301ca7 100644
--- a/indra/media_plugins/quicktime/media_plugin_quicktime.cpp
+++ b/indra/media_plugins/quicktime/media_plugin_quicktime.cpp
@@ -859,36 +859,6 @@ void MediaPluginQuickTime::receiveMessage(const char *message_string)
 				plugin_version += codec.str();
 				message.setValue("plugin_version", plugin_version);
 				sendMessage(message);
-
-				// Plugin gets to decide the texture parameters to use.
-				message.setMessage(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
-				#if defined(LL_WINDOWS)
-					// Values for Windows
-					mDepth = 3;
-					message.setValueU32("format", GL_RGB);
-					message.setValueU32("type", GL_UNSIGNED_BYTE);
-
-					// We really want to pad the texture width to a multiple of 32 bytes, but since we're using 3-byte pixels, it doesn't come out even.
-					// Padding to a multiple of 3*32 guarantees it'll divide out properly.
-					message.setValueU32("padding", 32 * 3);
-				#else
-					// Values for Mac
-					mDepth = 4;
-					message.setValueU32("format", GL_BGRA_EXT);
-					#ifdef __BIG_ENDIAN__
-						message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV );
-					#else
-						message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8);
-					#endif
-
-					// Pad texture width to a multiple of 32 bytes, to line up with cache lines.
-					message.setValueU32("padding", 32);
-				#endif
-				message.setValueS32("depth", mDepth);
-				message.setValueU32("internalformat", GL_RGB);
-				message.setValueBoolean("coords_opengl", true);	// true == use OpenGL-style coordinates, false == (0,0) is upper left.
-				message.setValueBoolean("allow_downsample", true);
-				sendMessage(message);
 			}
 			else if(message_name == "idle")
 			{
@@ -953,7 +923,41 @@ void MediaPluginQuickTime::receiveMessage(const char *message_string)
 		}
 		else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA)
 		{
-			if(message_name == "size_change")
+			if(message_name == "init")
+			{
+				// This is the media init message -- all necessary data for initialization should have been received.
+
+				// Plugin gets to decide the texture parameters to use.
+				LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
+				#if defined(LL_WINDOWS)
+					// Values for Windows
+					mDepth = 3;
+					message.setValueU32("format", GL_RGB);
+					message.setValueU32("type", GL_UNSIGNED_BYTE);
+
+					// We really want to pad the texture width to a multiple of 32 bytes, but since we're using 3-byte pixels, it doesn't come out even.
+					// Padding to a multiple of 3*32 guarantees it'll divide out properly.
+					message.setValueU32("padding", 32 * 3);
+				#else
+					// Values for Mac
+					mDepth = 4;
+					message.setValueU32("format", GL_BGRA_EXT);
+					#ifdef __BIG_ENDIAN__
+						message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8_REV );
+					#else
+						message.setValueU32("type", GL_UNSIGNED_INT_8_8_8_8);
+					#endif
+
+					// Pad texture width to a multiple of 32 bytes, to line up with cache lines.
+					message.setValueU32("padding", 32);
+				#endif
+				message.setValueS32("depth", mDepth);
+				message.setValueU32("internalformat", GL_RGB);
+				message.setValueBoolean("coords_opengl", true);	// true == use OpenGL-style coordinates, false == (0,0) is upper left.
+				message.setValueBoolean("allow_downsample", true);
+				sendMessage(message);
+			}
+			else if(message_name == "size_change")
 			{
 				std::string name = message_in.getValue("name");
 				S32 width = message_in.getValueS32("width");
diff --git a/indra/media_plugins/webkit/media_plugin_webkit.cpp b/indra/media_plugins/webkit/media_plugin_webkit.cpp
index afde904be6..24c53638d2 100644
--- a/indra/media_plugins/webkit/media_plugin_webkit.cpp
+++ b/indra/media_plugins/webkit/media_plugin_webkit.cpp
@@ -88,10 +88,12 @@ public:
 private:
 
 	std::string mProfileDir;
+	std::string mHostLanguage;
 
 	enum
 	{
-		INIT_STATE_UNINITIALIZED,		// Browser instance hasn't been set up yet
+		INIT_STATE_UNINITIALIZED,		// LLQtWebkit hasn't been set up yet
+		INIT_STATE_INITIALIZED,			// LLQtWebkit has been set up, but no browser window has been created yet.
 		INIT_STATE_NAVIGATING,			// Browser instance has been set up and initial navigate to about:blank has been issued
 		INIT_STATE_NAVIGATE_COMPLETE,	// initial navigate to about:blank has completed
 		INIT_STATE_WAIT_REDRAW,			// First real navigate begin has been received, waiting for page changed event to start handling redraws
@@ -191,13 +193,6 @@ private:
 		if ( mInitState > INIT_STATE_UNINITIALIZED )
 			return true;
 
-		// not enough information to initialize the browser yet.
-		if ( mWidth < 0 || mHeight < 0 || mDepth < 0 || 
-				mTextureWidth < 0 || mTextureHeight < 0 )
-		{
-			return false;
-		};
-
 		// set up directories
 		char cwd[ FILENAME_MAX ];	// I *think* this is defined on all platforms we use
 		if (NULL == getcwd( cwd, FILENAME_MAX - 1 ))
@@ -208,12 +203,12 @@ private:
 		std::string application_dir = std::string( cwd );
 
 #if LL_DARWIN
-	// When running under the Xcode debugger, there's a setting called "Break on Debugger()/DebugStr()" which defaults to being turned on.
-	// This causes the environment variable USERBREAK to be set to 1, which causes these legacy calls to break into the debugger.
-	// This wouldn't cause any problems except for the fact that the current release version of the Flash plugin has a call to Debugger() in it
-	// which gets hit when the plugin is probed by webkit.
-	// Unsetting the environment variable here works around this issue.
-	unsetenv("USERBREAK");
+		// When running under the Xcode debugger, there's a setting called "Break on Debugger()/DebugStr()" which defaults to being turned on.
+		// This causes the environment variable USERBREAK to be set to 1, which causes these legacy calls to break into the debugger.
+		// This wouldn't cause any problems except for the fact that the current release version of the Flash plugin has a call to Debugger() in it
+		// which gets hit when the plugin is probed by webkit.
+		// Unsetting the environment variable here works around this issue.
+		unsetenv("USERBREAK");
 #endif
 
 #if LL_WINDOWS
@@ -254,66 +249,92 @@ private:
 		bool result = LLQtWebKit::getInstance()->init( application_dir, component_dir, mProfileDir, native_window_handle );
 		if ( result )
 		{
-			// create single browser window
-			mBrowserWindowId = LLQtWebKit::getInstance()->createBrowserWindow( mWidth, mHeight );
+			mInitState = INIT_STATE_INITIALIZED;
+			
+			return true;
+		};
+
+		return false;
+	};
+
+	////////////////////////////////////////////////////////////////////////////////
+	//
+	bool initBrowserWindow()
+	{
+		// already initialized
+		if ( mInitState > INIT_STATE_INITIALIZED )
+			return true;
+
+		// not enough information to initialize the browser yet.
+		if ( mWidth < 0 || mHeight < 0 || mDepth < 0 || 
+				mTextureWidth < 0 || mTextureHeight < 0 )
+		{
+			return false;
+		};
+		
+		// Set up host language before creating browser window
+		if(!mHostLanguage.empty())
+		{
+			LLQtWebKit::getInstance()->setHostLanguage(mHostLanguage);
+		}
+		
+		// create single browser window
+		mBrowserWindowId = LLQtWebKit::getInstance()->createBrowserWindow( mWidth, mHeight );
 #if LL_WINDOWS
-			// Enable plugins
-			LLQtWebKit::getInstance()->enablePlugins(true);
+		// Enable plugins
+		LLQtWebKit::getInstance()->enablePlugins(true);
 #elif LL_DARWIN
-			// Enable plugins
-			LLQtWebKit::getInstance()->enablePlugins(true);
+		// Enable plugins
+		LLQtWebKit::getInstance()->enablePlugins(true);
 #elif LL_LINUX
-			// Enable plugins
-			LLQtWebKit::getInstance()->enablePlugins(true);
+		// Enable plugins
+		LLQtWebKit::getInstance()->enablePlugins(true);
 #endif
-			// Enable cookies
-			LLQtWebKit::getInstance()->enableCookies( true );
+		// Enable cookies
+		LLQtWebKit::getInstance()->enableCookies( true );
 
-			// tell LLQtWebKit about the size of the browser window
-			LLQtWebKit::getInstance()->setSize( mBrowserWindowId, mWidth, mHeight );
+		// tell LLQtWebKit about the size of the browser window
+		LLQtWebKit::getInstance()->setSize( mBrowserWindowId, mWidth, mHeight );
 
-			// observer events that LLQtWebKit emits
-			LLQtWebKit::getInstance()->addObserver( mBrowserWindowId, this );
+		// observer events that LLQtWebKit emits
+		LLQtWebKit::getInstance()->addObserver( mBrowserWindowId, this );
 
-			// append details to agent string
-			LLQtWebKit::getInstance()->setBrowserAgentId( "LLPluginMedia Web Browser" );
+		// append details to agent string
+		LLQtWebKit::getInstance()->setBrowserAgentId( "LLPluginMedia Web Browser" );
 
 #if !LL_QTWEBKIT_USES_PIXMAPS
-			// don't flip bitmap
-			LLQtWebKit::getInstance()->flipWindow( mBrowserWindowId, true );
+		// don't flip bitmap
+		LLQtWebKit::getInstance()->flipWindow( mBrowserWindowId, true );
 #endif // !LL_QTWEBKIT_USES_PIXMAPS
-			
-			// set background color
-			// convert background color channels from [0.0, 1.0] to [0, 255];
-			LLQtWebKit::getInstance()->setBackgroundColor( mBrowserWindowId, int(mBackgroundR * 255.0f), int(mBackgroundG * 255.0f), int(mBackgroundB * 255.0f) );
-
-			// Set state _before_ starting the navigate, since onNavigateBegin might get called before this call returns.
-			setInitState(INIT_STATE_NAVIGATING);
-
-			// Don't do this here -- it causes the dreaded "white flash" when loading a browser instance.
-			// FIXME: Re-added this because navigating to a "page" initializes things correctly - especially
-			// for the HTTP AUTH dialog issues (DEV-41731). Will fix at a later date.
-			// Build a data URL like this: "data:text/html,%3Chtml%3E%3Cbody bgcolor=%22#RRGGBB%22%3E%3C/body%3E%3C/html%3E"
-			// where RRGGBB is the background color in HTML style
-			std::stringstream url;
-			
-			url << "data:text/html,%3Chtml%3E%3Cbody%20bgcolor=%22#";
-			// convert background color channels from [0.0, 1.0] to [0, 255];
-			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundR * 255.0f);
-			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundG * 255.0f);
-			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundB * 255.0f);
-			url << "%22%3E%3C/body%3E%3C/html%3E";
-			
-			lldebugs << "data url is: " << url.str() << llendl;
-						
-			LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, url.str() );
-//			LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, "about:blank" );
-
-			return true;
-		};
+		
+		// set background color
+		// convert background color channels from [0.0, 1.0] to [0, 255];
+		LLQtWebKit::getInstance()->setBackgroundColor( mBrowserWindowId, int(mBackgroundR * 255.0f), int(mBackgroundG * 255.0f), int(mBackgroundB * 255.0f) );
+
+		// Set state _before_ starting the navigate, since onNavigateBegin might get called before this call returns.
+		setInitState(INIT_STATE_NAVIGATING);
+
+		// Don't do this here -- it causes the dreaded "white flash" when loading a browser instance.
+		// FIXME: Re-added this because navigating to a "page" initializes things correctly - especially
+		// for the HTTP AUTH dialog issues (DEV-41731). Will fix at a later date.
+		// Build a data URL like this: "data:text/html,%3Chtml%3E%3Cbody bgcolor=%22#RRGGBB%22%3E%3C/body%3E%3C/html%3E"
+		// where RRGGBB is the background color in HTML style
+		std::stringstream url;
+		
+		url << "data:text/html,%3Chtml%3E%3Cbody%20bgcolor=%22#";
+		// convert background color channels from [0.0, 1.0] to [0, 255];
+		url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundR * 255.0f);
+		url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundG * 255.0f);
+		url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundB * 255.0f);
+		url << "%22%3E%3C/body%3E%3C/html%3E";
+		
+		lldebugs << "data url is: " << url.str() << llendl;
+					
+		LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, url.str() );
+//		LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, "about:blank" );
 
-		return false;
-	};
+		return true;	
+	}
 
 	void setVolume(F32 vol);
 
@@ -676,9 +697,6 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 		{
 			if(message_name == "init")
 			{
-				std::string user_data_path = message_in.getValue("user_data_path"); // n.b. always has trailing platform-specific dir-delimiter
-				mProfileDir = user_data_path + "browser_profile";
-
 				LLPluginMessage message("base", "init_response");
 				LLSD versions = LLSD::emptyMap();
 				versions[LLPLUGIN_MESSAGE_CLASS_BASE] = LLPLUGIN_MESSAGE_CLASS_BASE_VERSION;
@@ -690,23 +708,6 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 				plugin_version += LLQtWebKit::getInstance()->getVersion();
 				message.setValue("plugin_version", plugin_version);
 				sendMessage(message);
-				
-				// Plugin gets to decide the texture parameters to use.
-				mDepth = 4;
-
-				message.setMessage(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
-				message.setValueS32("default_width", 1024);
-				message.setValueS32("default_height", 1024);
-				message.setValueS32("depth", mDepth);
-				message.setValueU32("internalformat", GL_RGBA);
-#if LL_QTWEBKIT_USES_PIXMAPS
-				message.setValueU32("format", GL_BGRA_EXT); // I hope this isn't system-dependant... is it?  If so, we'll have to check the root window's pixel layout or something... yuck.
-#else
-				message.setValueU32("format", GL_RGBA);
-#endif // LL_QTWEBKIT_USES_PIXMAPS
-				message.setValueU32("type", GL_UNSIGNED_BYTE);
-				message.setValueBoolean("coords_opengl", true);
-				sendMessage(message);
 			}
 			else if(message_name == "idle")
 			{
@@ -771,7 +772,7 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 //				std::cerr << "MediaPluginWebKit::receiveMessage: unknown base message: " << message_name << std::endl;
 			}
 		}
-                else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME)
+		else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA_TIME)
 		{
 			if(message_name == "set_volume")
 			{
@@ -781,7 +782,50 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 		}
 		else if(message_class == LLPLUGIN_MESSAGE_CLASS_MEDIA)
 		{
-			if(message_name == "size_change")
+			if(message_name == "init")
+			{
+				// This is the media init message -- all necessary data for initialization should have been received.
+				if(initBrowser())
+				{
+					
+					// Plugin gets to decide the texture parameters to use.
+					mDepth = 4;
+
+					LLPluginMessage message(LLPLUGIN_MESSAGE_CLASS_MEDIA, "texture_params");
+					message.setValueS32("default_width", 1024);
+					message.setValueS32("default_height", 1024);
+					message.setValueS32("depth", mDepth);
+					message.setValueU32("internalformat", GL_RGBA);
+	#if LL_QTWEBKIT_USES_PIXMAPS
+					message.setValueU32("format", GL_BGRA_EXT); // I hope this isn't system-dependant... is it?  If so, we'll have to check the root window's pixel layout or something... yuck.
+	#else
+					message.setValueU32("format", GL_RGBA);
+	#endif // LL_QTWEBKIT_USES_PIXMAPS
+					message.setValueU32("type", GL_UNSIGNED_BYTE);
+					message.setValueBoolean("coords_opengl", true);
+					sendMessage(message);
+				}
+				else
+				{
+					// if initialization failed, we're done.
+					mDeleteMe = true;
+				}
+
+			}
+			else if(message_name == "set_user_data_path")
+			{
+				std::string user_data_path = message_in.getValue("path"); // n.b. always has trailing platform-specific dir-delimiter
+				mProfileDir = user_data_path + "browser_profile";
+
+				// FIXME: Should we do anything with this if it comes in after the browser has been initialized?
+			}
+			else if(message_name == "set_language_code")
+			{
+				mHostLanguage = message_in.getValue("language");
+
+				// FIXME: Should we do anything with this if it comes in after the browser has been initialized?
+			}
+			else if(message_name == "size_change")
 			{
 				std::string name = message_in.getValue("name");
 				S32 width = message_in.getValueS32("width");
@@ -803,29 +847,36 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 						mWidth = width;
 						mHeight = height;
 
-						// initialize (only gets called once)
-						initBrowser();
-
-						// size changed so tell the browser
-						LLQtWebKit::getInstance()->setSize( mBrowserWindowId, mWidth, mHeight );
-						
-//						std::cerr << "webkit plugin: set size to " << mWidth << " x " << mHeight 
-//								<< ", rowspan is " << LLQtWebKit::getInstance()->getBrowserRowSpan(mBrowserWindowId) << std::endl;
-								
-						S32 real_width = LLQtWebKit::getInstance()->getBrowserRowSpan(mBrowserWindowId) / LLQtWebKit::getInstance()->getBrowserDepth(mBrowserWindowId); 
-						
-						// The actual width the browser will be drawing to is probably smaller... let the host know by modifying texture_width in the response.
-						if(real_width <= texture_width)
+						if(initBrowserWindow())
 						{
-							texture_width = real_width;
+
+							// size changed so tell the browser
+							LLQtWebKit::getInstance()->setSize( mBrowserWindowId, mWidth, mHeight );
+							
+	//						std::cerr << "webkit plugin: set size to " << mWidth << " x " << mHeight 
+	//								<< ", rowspan is " << LLQtWebKit::getInstance()->getBrowserRowSpan(mBrowserWindowId) << std::endl;
+									
+							S32 real_width = LLQtWebKit::getInstance()->getBrowserRowSpan(mBrowserWindowId) / LLQtWebKit::getInstance()->getBrowserDepth(mBrowserWindowId); 
+							
+							// The actual width the browser will be drawing to is probably smaller... let the host know by modifying texture_width in the response.
+							if(real_width <= texture_width)
+							{
+								texture_width = real_width;
+							}
+							else
+							{
+								// This won't work -- it'll be bigger than the allocated memory.  This is a fatal error.
+	//							std::cerr << "Fatal error: browser rowbytes greater than texture width" << std::endl;
+								mDeleteMe = true;
+								return;
+							}
 						}
 						else
 						{
-							// This won't work -- it'll be bigger than the allocated memory.  This is a fatal error.
-//							std::cerr << "Fatal error: browser rowbytes greater than texture width" << std::endl;
+							// Setting up the browser window failed.  This is a fatal error.
 							mDeleteMe = true;
-							return;
 						}
+
 						
 						mTextureWidth = texture_width;
 						mTextureHeight = texture_height;
diff --git a/indra/newview/llviewermedia.cpp b/indra/newview/llviewermedia.cpp
index 64dcd62a6a..b9509a98f5 100644
--- a/indra/newview/llviewermedia.cpp
+++ b/indra/newview/llviewermedia.cpp
@@ -1258,8 +1258,9 @@ LLPluginClassMedia* LLViewerMediaImpl::newSourceFromMediaType(std::string media_
 		{
 			LLPluginClassMedia* media_source = new LLPluginClassMedia(owner);
 			media_source->setSize(default_width, default_height);
-			std::string language_code = LLUI::getLanguage();
-			if (media_source->init(launcher_name, plugin_name, gSavedSettings.getBOOL("PluginAttachDebuggerToPlugins"), user_data_path, language_code))
+			media_source->setUserDataPath(user_data_path);
+			media_source->setLanguageCode(LLUI::getLanguage());
+			if (media_source->init(launcher_name, plugin_name, gSavedSettings.getBOOL("PluginAttachDebuggerToPlugins")))
 			{
 				return media_source;
 			}
diff --git a/indra/test_apps/llplugintest/llmediaplugintest.cpp b/indra/test_apps/llplugintest/llmediaplugintest.cpp
index e5a846f15a..5677308fb0 100644
--- a/indra/test_apps/llplugintest/llmediaplugintest.cpp
+++ b/indra/test_apps/llplugintest/llmediaplugintest.cpp
@@ -1593,8 +1593,8 @@ void LLMediaPluginTest::addMediaPanel( std::string url )
 	}
 	std::string user_data_path = std::string( cwd ) + "/";
 #endif
-
-	media_source->init( launcher_name, plugin_name, false, user_data_path );
+	media_source->setUserDataPath(user_data_path);
+	media_source->init( launcher_name, plugin_name, false );
 	media_source->setDisableTimeout(mDisableTimeout);
 
 	// make a new panel and save parameters
@@ -1831,7 +1831,8 @@ void LLMediaPluginTest::replaceMediaPanel( mediaPanel* panel, std::string url )
 	std::string user_data_path = std::string( cwd ) + "/";
 #endif
 
-	media_source->init( launcher_name, plugin_name, false, user_data_path );
+	media_source->setUserDataPath(user_data_path);
+	media_source->init( launcher_name, plugin_name, false );
 	media_source->setDisableTimeout(mDisableTimeout);
 
 	// make a new panel and save parameters