Remove foreground tab idle handler

content/renderer/render_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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 436 matching lines @@
 #if defined(OS_MACOSX)
   void OnUpdateScrollbarTheme(float initial_button_delay,
                               float autoscroll_button_delay,
                               bool jump_on_track_click,
                               blink::ScrollerStyle preferred_scroller_style,
                               bool redraw);
 #endif
   void OnCreateNewSharedWorker(
       const WorkerProcessMsg_CreateWorker_Params& params);
 
-  void IdleHandlerInForegroundTab();
-
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> CreateOffscreenContext3d();
 
   // These objects live solely on the render thread.
   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
   scoped_ptr<RendererWebKitPlatformSupportImpl> webkit_platform_support_;
   scoped_ptr<EmbeddedWorkerDispatcher> embedded_worker_dispatcher_;
 
   // Used on the render thread and deleted by WebKit at shutdown.
@@ skipping 119 matching lines @@
   bool is_one_copy_enabled_;
 
   std::map<int, mojo::MessagePipeHandle> pending_render_frame_connects_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_