Sky: update the HTMLIFrameElement's geometry during paint invalidation rather

sky/engine/core/rendering/RenderIFrame.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 RenderIFrame_h
 #define RenderIFrame_h
 
 #include "core/rendering/RenderReplaced.h"
 
 namespace blink {
 
 class HTMLIFrameElement;
 
 class RenderIFrame : public RenderReplaced {
 public:
     explicit RenderIFrame(HTMLIFrameElement*);
     virtual ~RenderIFrame();
 
-protected:
-    void layout() override;
+    // RenderReplaced methods:
+    void invalidateWidgetBounds() override;
 
 private:
     LayerType layerTypeRequired() const override { return NormalLayer; }
     void paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset) override;
 };
 
 } // namespace blink
 
 #endif // RenderIFrame_h