Fix for EXT-5960 (Store media cookies per user rather than per viewer)

Reviewed by RN and MW

indra/newview/llviewermedia.cpp

@@ -1229,6 +1229,19 @@ LLPluginClassMedia* LLViewerMediaImpl::newSourceFromMediaType(std::string media_
 		std::string user_data_path = gDirUtilp->getOSUserAppDir();
 		user_data_path += gDirUtilp->getDirDelimiter();
 
+		// Fix for EXT-5960 - make browser profile specific to user (cache, cookies etc.)
+		// If the linden username returned is blank, that can only mean we are
+		// at the login page displaying login Web page or Web browser test via Develop menu.
+		// In this case we just use whatever gDirUtilp->getOSUserAppDir() gives us (this
+		// is what we always used before this change)
+		std::string linden_user_dir = gDirUtilp->getLindenUserDir();
+		if ( ! linden_user_dir.empty() )
+		{
+			// gDirUtilp->getLindenUserDir() is whole path, not just Linden name
+			user_data_path = linden_user_dir;
+			user_data_path += gDirUtilp->getDirDelimiter();
+		};
+
 		// See if the plugin executable exists
 		llstat s;
 		if(LLFile::stat(launcher_name, &s))