Fix main thread top controls scrolling to mirror CC.

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.
@@ skipping 48 matching lines @@
 public:
     // This method closes and deletes the WebWidget.
     virtual void close() { }
 
     // Returns the current size of the WebWidget.
     virtual WebSize size() { return WebSize(); }
 
     // Called to resize the WebWidget.
     virtual void resize(const WebSize&) { }
 
+    // Called to resize the WebWidget and top controls at the same time. Change
+    // both the widget size and top controls layout affecting height at the same
+    // time to prevent changing the viewport scroll offset due to clamping.
+    virtual void resize(
+        const WebSize&,
+        float topControlsHeight,
+        bool topControlsShrinkLayoutSize) { }
+
     // Resizes the unscaled visual viewport. Normally the unscaled visual
     // 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() { }
@@ skipping 160 matching lines @@
     virtual void didChangeWindowResizerRect() { }
 
     // The page background color. Can be used for filling in areas without
     // content.
     virtual WebColor backgroundColor() const { return 0xFFFFFFFF; /* SK_ColorWHITE */ }
 
     // The currently open page popup, which are calendar and datalist pickers
     // but not the select popup.
     virtual WebPagePopup* pagePopup() const { return 0; }
 
-    // Notification about the top controls height.  If the boolean is true, then
-    // the embedder shrunk the WebView size by the top controls height.
-    virtual void setTopControlsHeight(float height, bool topControlsShrinkLayoutSize) { }
-
     // Updates top controls constraints and current state. Allows embedder to
     // control what are valid states for top controls and if it should animate.
     virtual void updateTopControlsState(WebTopControlsState constraints, WebTopControlsState current, bool animate) { }
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif