Notifying the Out of Process Renderer about Visibility Change of a Remote Frame

content/browser/frame_host/cross_process_frame_connector.h

 // Copyright 2014 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_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_
 #define CONTENT_BROWSER_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_
 
 #include <stdint.h>
 
 #include "cc/output/compositor_frame.h"
@@ skipping 99 matching lines @@
   bool HasFocus();
 
  private:
   // Handlers for messages received from the parent frame.
   void OnCompositorFrameSwappedACK(
       const FrameHostMsg_CompositorFrameSwappedACK_Params& params);
   void OnReclaimCompositorResources(
       const FrameHostMsg_ReclaimCompositorResources_Params& params);
   void OnForwardInputEvent(const blink::WebInputEvent* event);
   void OnFrameRectChanged(const gfx::Rect& frame_rect);
+  void OnVisibilityChanged(bool visible);
   void OnInitializeChildFrame(gfx::Rect frame_rect, float scale_factor);
   void OnSatisfySequence(const cc::SurfaceSequence& sequence);
   void OnRequireSequence(const cc::SurfaceId& id,
                          const cc::SurfaceSequence& sequence);
 
   void SetDeviceScaleFactor(float scale_factor);
   void SetSize(gfx::Rect frame_rect);
 
   // Retrieve the view for the top-level frame under the same WebContents.
   RenderWidgetHostViewBase* GetRootRenderWidgetHostView();
 
   // The RenderFrameProxyHost that routes messages to the parent frame's
   // renderer process.
   RenderFrameProxyHost* frame_proxy_in_parent_renderer_;
 
   // The RenderWidgetHostView for the frame. Initially NULL.
   RenderWidgetHostViewChildFrame* view_;
 
   gfx::Rect child_frame_rect_;
   float device_scale_factor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_CROSS_PROCESS_FRAME_CONNECTOR_H_