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

third_party/WebKit/Source/core/frame/RemoteFrameClient.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 RemoteFrameClient_h
 #define RemoteFrameClient_h
 
 #include "core/frame/FrameClient.h"
 #include "core/frame/FrameTypes.h"
 #include "core/loader/FrameLoaderTypes.h"
@@ skipping 13 matching lines @@
     virtual void reload(FrameLoadType, ClientRedirectPolicy) = 0;
     virtual unsigned backForwardLength() = 0;
 
     // FIXME: Remove this method once we have input routing in the browser
     // process. See http://crbug.com/339659.
     virtual void forwardInputEvent(Event*) = 0;
 
     virtual void frameRectsChanged(const IntRect& frameRect) = 0;
 
     virtual void advanceFocus(WebFocusType, LocalFrame* source) = 0;
+
+    virtual void visibilityChanged(bool visible) = 0;
 };
 
 } // namespace blink
 
 #endif // RemoteFrameClient_h