Adding WebThread and new BlinkPlatformImpl for utility thread.

content/utility/utility_thread_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
 #define CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/child/child_thread_impl.h"
 #include "content/common/content_export.h"
 #include "content/public/utility/utility_thread.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace content {
 class BlinkPlatformImpl;
+class UtilityBlinkPlatformImpl;
 
 #if defined(COMPILER_MSVC)
 // See explanation for other RenderViewHostImpl which is the same issue.
 #pragma warning(push)
 #pragma warning(disable: 4250)
 #endif
 
 // This class represents the background thread where the utility task runs.
 class UtilityThreadImpl : public UtilityThread,
                           public ChildThreadImpl {
@@ skipping 16 matching lines @@
   void OnBatchModeStarted();
   void OnBatchModeFinished();
 
 #if defined(OS_POSIX) && defined(ENABLE_PLUGINS)
   void OnLoadPlugins(const std::vector<base::FilePath>& plugin_paths);
 #endif
 
   // True when we're running in batch mode.
   bool batch_mode_;
 
-  scoped_ptr<BlinkPlatformImpl> blink_platform_impl_;
+  scoped_ptr<UtilityBlinkPlatformImpl> blink_platform_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(UtilityThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_