Revert of use v8 Microtask Queue

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 91 matching lines @@
 
 void initialize(Platform* platform)
 {
     initializeWithoutV8(platform);
 
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
     WebCore::V8Initializer::initializeMainThreadIfNeeded(isolate);
     v8::V8::SetEntropySource(&generateEntropy);
     v8::V8::SetArrayBufferAllocator(WebCore::v8ArrayBufferAllocator());
     v8::V8::Initialize();
-    v8::V8::SetAutorunMicrotasks(isolate, false);
     WebCore::V8PerIsolateData::ensureInitialized(isolate);
 
     s_isolateInterruptor = new WebCore::V8IsolateInterruptor(v8::Isolate::GetCurrent());
     WebCore::ThreadState::current()->addInterruptor(s_isolateInterruptor);
 
     // currentThread will always be non-null in production, but can be null in Chromium unit tests.
     if (WebThread* currentThread = platform->currentThread()) {
 #ifndef NDEBUG
         v8::V8::AddCallCompletedCallback(&assertV8RecursionScope);
 #endif
@@ skipping 127 matching lines @@
         channel->state = WTFLogChannelOn;
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     WebCore::Page::refreshPlugins(reloadPages);
 }
 
 } // namespace blink