Notify Blink to suppress frame requests during BeginMainFrame

third_party/WebKit/public/web/WebWidget.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 58 matching lines @@
   // viewport is the same size as the main frame. The passed size becomes the
   // size of the viewport when unscaled (i.e. scale = 1). This is used to
   // shrink the visible viewport to allow things like the ChromeOS virtual
   // keyboard to overlay over content but allow scrolling it into view.
   virtual void resizeVisualViewport(const WebSize&) {}
 
   // Called to notify the WebWidget of entering/exiting fullscreen mode.
   virtual void didEnterFullscreen() {}
   virtual void didExitFullscreen() {}
 
+  // TODO(crbug.com/704763): Remove the need for this.
+  virtual void setSuppressFrameRequestsWorkaroundFor704763Only(bool) {}
+
   // Called to update imperative animation state. This should be called before
   // paint, although the client can rate-limit these calls.
   // |lastFrameTimeMonotonic| is in seconds.
   virtual void beginFrame(double lastFrameTimeMonotonic) {}
 
   // Called to run through the entire set of document lifecycle phases needed
   // to render a frame of the web widget. This MUST be called before Paint,
   // and it may result in calls to WebWidgetClient::didInvalidateRect.
   virtual void updateAllLifecyclePhases() {}
 
@@ skipping 129 matching lines @@
     return false;
   }
 
  protected:
   ~WebWidget() {}
 };
 
 }  // namespace blink
 
 #endif