Initialize webkit thread asynchronously

content/browser/in_process_webkit/webkit_thread.h

Index: content/browser/in_process_webkit/webkit_thread.h
diff --git a/content/browser/in_process_webkit/webkit_thread.h b/content/browser/in_process_webkit/webkit_thread.h
index 5c62e2ef16946c1ce2e1999450857e8ec044ef30..fa1a95d9198fe09ab13ef16829f49fc6b6744049 100644
--- a/content/browser/in_process_webkit/webkit_thread.h
+++ b/content/browser/in_process_webkit/webkit_thread.h
@@ -13,6 +13,7 @@
 #include "content/common/content_export.h"
 
 class BrowserWebKitPlatformSupportImpl;
+class InternalWebKitThread;
 
 // This creates a WebKit main thread on instantiation (if not in
 // --single-process mode) on construction and kills it on deletion.
@@ -24,21 +25,6 @@ class CONTENT_EXPORT WebKitThread {
   void Initialize();
 
  private:
-  // Must be private so that we can carefully control its lifetime.
-  class InternalWebKitThread : public content::BrowserThreadImpl {
-   public:
-    InternalWebKitThread();
-    virtual ~InternalWebKitThread();
-    // Does the actual initialization and shutdown of WebKit.  Called at the
-    // beginning and end of the thread's lifetime.
-    virtual void Init();
-    virtual void CleanUp();
-
-   private:
-    // The WebKitPlatformSupport implementation.  Only access on WebKit thread.
-    scoped_ptr<BrowserWebKitPlatformSupportImpl> webkit_platform_support_;
-  };
-
   // Pointer to the actual WebKitThread.
   scoped_ptr<InternalWebKitThread> webkit_thread_;