Fix main thread top controls scrolling to mirror CC.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index d88519061578b5fcbaea746467bdb209f58128e7..681ab1b5b39017a4c5dc1c1d648edbdaf9ed378b 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -412,6 +412,8 @@ class CONTENT_EXPORT RenderWidget
   void DoDeferredClose();
   void NotifyOnClose();
 
+  virtual void ResizeWebWidget(const ResizeParams& params);
+
   // Close the underlying WebWidget.
   virtual void Close();
 
@@ -605,14 +607,6 @@ class CONTENT_EXPORT RenderWidget
   // The size of the view's backing surface in non-DPI-adjusted pixels.
   gfx::Size physical_backing_size_;
 
-  // Whether or not Blink's viewport size should be shrunk by the height of the
-  // URL-bar (always false on platforms where URL-bar hiding isn't supported).
-  bool top_controls_shrink_blink_size_;
-
-  // The height of the top controls (always 0 on platforms where URL-bar hiding
-  // isn't supported).
-  float top_controls_height_;
-
   // The size of the visible viewport in DPI-adjusted pixels.
   gfx::Size visible_viewport_size_;
 
@@ -767,10 +761,10 @@ class CONTENT_EXPORT RenderWidget
   scoped_ptr<scheduler::RenderWidgetSchedulingState>
       render_widget_scheduling_state_;
 
- private:
   // When emulated, this returns original device scale factor.
   float GetOriginalDeviceScaleFactor() const;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };