Cheaper thread-safe atomic initialization of static references.

Source/web/WebKit.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 147 matching lines @@
         currentThread->addTaskObserver(s_pendingGCRunner);
 
         ASSERT(!s_messageLoopInterruptor);
         s_messageLoopInterruptor = new MessageLoopInterruptor(currentThread);
         ThreadState::current()->addInterruptor(s_messageLoopInterruptor);
     }
 
     DEFINE_STATIC_LOCAL(ModulesInitializer, initializer, ());
     initializer.init();
 
-    // There are some code paths (for example, running WebKit in the browser
-    // process and calling into LocalStorage before anything else) where the
-    // UTF8 string encoding tables are used on a background thread before
-    // they're set up.  This is a problem because their set up routines assert
-    // they're running on the main WebKitThread.  It might be possible to make
-    // the initialization thread-safe, but given that so many code paths use
-    // this, initializing this lazily probably doesn't buy us much.
-    WTF::UTF8Encoding();
-
     setIndexedDBClientCreateFunction(IndexedDBClientImpl::create);
 
     MediaPlayer::setMediaEngineCreateFunction(WebMediaPlayerClientImpl::create);
 }
 
 void shutdown()
 {
     // currentThread will always be non-null in production, but can be null in Chromium unit tests.
     if (Platform::current()->currentThread()) {
         // We don't need to (cannot) remove s_endOfTaskRunner from the current
@@ skipping 79 matching lines @@
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     ASSERT(!reloadPages);
     Page::refreshPlugins();
 }
 
 } // namespace blink