Use the scheduling mechanism provided by the platform

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 130 matching lines @@
     ASSERT(!s_webKitInitialized);
     s_webKitInitialized = true;
 
     ASSERT(platform);
     Platform::initialize(platform);
 
     WTF::setRandomSource(cryptographicallyRandomValues);
     WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction);
     WTF::initializeMainThread(callOnMainThreadFunction);
     Heap::init();
-    Scheduler::initializeOnMainThread();
 
     ThreadState::attachMainThread();
     // currentThread will always be non-null in production, but can be null in Chromium unit tests.
     if (WebThread* currentThread = platform->currentThread()) {
         ASSERT(!s_pendingGCRunner);
         s_pendingGCRunner = new PendingGCRunner;
         currentThread->addTaskObserver(s_pendingGCRunner);
 
         ASSERT(!s_messageLoopInterruptor);
         s_messageLoopInterruptor = new MessageLoopInterruptor(currentThread);
@@ skipping 94 matching lines @@
         channel->state = WTFLogChannelOn;
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     Page::refreshPlugins(reloadPages);
 }
 
 } // namespace blink