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

content/browser/renderer_host/render_widget_host_delegate.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_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
@@ skipping 87 matching lines @@
   // Requests the renderer to select the region between two points in the
   // currently focused frame.
   virtual void SelectRange(const gfx::Point& base, const gfx::Point& extent) {}
 
   virtual RenderWidgetHostInputEventRouter* GetInputEventRouter();
 
   // Send page-level focus state to all SiteInstances involved in rendering the
   // current FrameTree, not including the main frame's SiteInstance.
   virtual void ReplicatePageFocus(bool is_focused) {}
 
+  // Returns true if this delegate corresponds to a guest WebContents and the
+  // change in visibility is forwarded to all RenderWidgetHostViews.
+  virtual bool DidForwardVisibilityChangeToGuest(bool visible);
+
 #if defined(OS_WIN)
   virtual gfx::NativeViewAccessible GetParentNativeViewAccessible();
 #endif
 
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_