workers: Move where idle-tasks are turned on for v8::Isolate.

third_party/WebKit/Source/core/workers/WorkerThread.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 269 matching lines @@
             // Notify the main thread that it is safe to deallocate our resources.
             m_terminationEvent->signal();
             return;
         }
 
         m_microtaskRunner = adoptPtr(new WorkerMicrotaskRunner(this));
         initializeBackingThread();
         backingThread().addTaskObserver(m_microtaskRunner.get());
 
         m_isolate = initializeIsolate();
-        if (RuntimeEnabledFeatures::v8IdleTasksEnabled()) {
-            V8PerIsolateData::enableIdleTasks(m_isolate, adoptPtr(new V8IdleTaskRunner(m_webScheduler)));
-        }
         // Optimize for memory usage instead of latency for the worker isolate.
         m_isolate->IsolateInBackgroundNotification();
         m_workerGlobalScope = createWorkerGlobalScope(startupData);
         m_workerGlobalScope->scriptLoaded(sourceCode.length(), cachedMetaData.get() ? cachedMetaData->size() : 0);
 
         didStartWorkerThread();
 
         // Notify proxy that a new WorkerGlobalScope has been created and started.
         m_workerReportingProxy.workerGlobalScopeStarted(m_workerGlobalScope.get());
 
@@ skipping 177 matching lines @@
 v8::Isolate* WorkerThread::initializeIsolate()
 {
     ASSERT(isCurrentThread());
     ASSERT(!m_isolate);
     v8::Isolate* isolate = V8PerIsolateData::initialize();
     V8Initializer::initializeWorker(isolate);
 
     OwnPtr<V8IsolateInterruptor> interruptor = adoptPtr(new V8IsolateInterruptor(isolate));
     ThreadState::current()->addInterruptor(interruptor.release());
     ThreadState::current()->registerTraceDOMWrappers(isolate, V8GCController::traceDOMWrappers);
-
+    if (RuntimeEnabledFeatures::v8IdleTasksEnabled())
+        V8PerIsolateData::enableIdleTasks(isolate, adoptPtr(new V8IdleTaskRunner(m_webScheduler)));
     return isolate;
 }
 
 void WorkerThread::willDestroyIsolate()
 {
     ASSERT(isCurrentThread());
     ASSERT(m_isolate);
     V8PerIsolateData::willBeDestroyed(m_isolate);
 }
 
@@ skipping 51 matching lines @@
     InspectorInstrumentation::didLeaveNestedRunLoop(m_workerGlobalScope.get());
 }
 
 void WorkerThread::setWorkerInspectorController(WorkerInspectorController* workerInspectorController)
 {
     MutexLocker locker(m_workerInspectorControllerMutex);
     m_workerInspectorController = workerInspectorController;
 }
 
 } // namespace blink