Script streaming: Add an option to make the main thread block (wait for parsing)

Source/bindings/core/v8/ScriptStreamerThread.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "bindings/core/v8/ScriptStreamerThread.h"
 
 #include "bindings/core/v8/ScriptStreamer.h"
 #include "platform/Task.h"
 #include "platform/TraceEvent.h"
@@ skipping 49 matching lines @@
 
 ScriptStreamingTask::ScriptStreamingTask(WTF::PassOwnPtr<v8::ScriptCompiler::ScriptStreamingTask> task, ScriptStreamer* streamer)
     : m_v8Task(task), m_streamer(streamer) { }
 
 void ScriptStreamingTask::run()
 {
     TRACE_EVENT0("v8", "v8.parseOnBackground");
     // Running the task can and will block: SourceStream::GetSomeData will get
     // called and it will block and wait for data from the network.
     m_v8Task->Run();
-    // Post a task to the main thread to signal that V8 has completed the
-    // streaming.
-    callOnMainThread(WTF::bind(&ScriptStreamer::streamingComplete, m_streamer));
+    m_streamer->streamingCompleteOnBackgroundThread();
     ScriptStreamerThread::shared()->taskDone();
 }
 
 } // namespace blink