Android: Throttle BeginFrame messages sent from the browser.

content/browser/renderer_host/render_widget_host_view_android.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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <map>
 #include <queue>
 
@@ skipping 255 matching lines @@
   // The mailbox of the previously received frame.
   gpu::Mailbox current_mailbox_;
 
   // The mailbox of the frame we last returned.
   gpu::Mailbox last_mailbox_;
 
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
   std::queue<base::Closure> ack_callbacks_;
 
+  // Indicates that we are waiting for a frame from the renderer.
+  bool begin_frame_pending_;
+
   // Used to render overscroll overlays.
   scoped_ptr<OverscrollGlow> overscroll_effect_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_