Fix main thread top controls scrolling to mirror CC.

content/renderer/render_widget.h

 // Copyright (c) 2012 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 CONTENT_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 394 matching lines @@
   // active RenderWidgets.
   void SetSwappedOut(bool is_swapped_out);
 
   // Allows the process to exit once the unload handler has finished, if there
   // are no other active RenderWidgets.
   void WasSwappedOut();
 
   void DoDeferredClose();
   void NotifyOnClose();
 
+  virtual void ResizeWebWidget(const gfx::Size& new_size, bool resized);
+
   // Close the underlying WebWidget.
   virtual void Close();
 
   // Used to force the size of a window when running layout tests.
   void SetWindowRectSynchronously(const gfx::Rect& new_window_rect);
 #if defined(OS_MACOSX) || defined(OS_ANDROID)
   void SetExternalPopupOriginAdjustmentsForEmulation(
       ExternalPopupMenu* popup,
       RenderWidgetScreenMetricsEmulator* emulator);
 #endif
@@ skipping 173 matching lines @@
   // We store the current cursor object so we can avoid spamming SetCursor
   // messages.
   WebCursor current_cursor_;
 
   // The size of the RenderWidget.
   gfx::Size size_;
 
   // 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_;
 
   // The area that must be reserved for drawing the resize corner.
   gfx::Rect resizer_rect_;
 
   // Flags for the next ViewHostMsg_UpdateRect message.
   int next_paint_flags_;
 
   // Whether the WebWidget is in auto resize mode, which is used for example
@@ skipping 134 matching lines @@
   // are sent to each frame in the list for events such as changing
   // visibility state for example.
   base::ObserverList<RenderFrameImpl> render_frames_;
 
   bool has_host_context_menu_location_;
   gfx::Point host_context_menu_location_;
 
   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);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_