Change default force composite setting to true

Source/web/WebSharedWorkerImpl.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 173 matching lines @@
 }
 
 void WebSharedWorkerImpl::initializeLoader(const WebURL& url)
 {
     // Create 'shadow page'. This page is never displayed, it is used to proxy the
     // loading requests from the worker context to the rest of WebKit and Chromium
     // infrastructure.
     ASSERT(!m_webView);
     m_webView = WebView::create(0);
     m_webView->settings()->setOfflineWebApplicationCacheEnabled(RuntimeEnabledFeatures::applicationCacheEnabled());
+    // FIXME: http://crbug.com/363843. This needs to find a better way to
+    // not create graphics layers.
+    m_webView->settings()->setAcceleratedCompositingEnabled(false);
     // FIXME: Settings information should be passed to the Worker process from Browser process when the worker
     // is created (similar to RenderThread::OnCreateNewView).
     m_mainFrame = WebLocalFrame::create(this);
     m_webView->setMainFrame(m_mainFrame);
 
     WebLocalFrameImpl* webFrame = toWebLocalFrameImpl(m_webView->mainFrame());
 
     // Construct substitute data source for the 'shadow page'. We only need it
     // to have same origin as the worker so the loading checks work correctly.
     CString content("");
@@ skipping 229 matching lines @@
     workerThread()->runLoop().postDebuggerTask(createCallbackTask(dispatchOnInspectorBackendTask, String(message)));
     WorkerDebuggerAgent::interruptAndDispatchInspectorCommands(workerThread());
 }
 
 WebSharedWorker* WebSharedWorker::create(WebSharedWorkerClient* client)
 {
     return new WebSharedWorkerImpl(client);
 }
 
 } // namespace blink