Add a way to fetch window frame metrics from NativeShellWindow

chrome/browser/ui/gtk/extensions/shell_window_gtk.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 CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "base/timer.h"
@@ skipping 47 matching lines @@
   // NativeShellWindow implementation.
   virtual void SetFullscreen(bool fullscreen) OVERRIDE;
   virtual bool IsFullscreenOrPending() const OVERRIDE;
   virtual void UpdateWindowIcon() OVERRIDE;
   virtual void UpdateWindowTitle() OVERRIDE;
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void UpdateDraggableRegions(
       const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
   virtual void RenderViewHostChanged() OVERRIDE {}
+  virtual gfx::Insets GetFrameInsets() const OVERRIDE;
 
   content::WebContents* web_contents() const {
     return shell_window_->web_contents();
   }
   const extensions::Extension* extension() const {
     return shell_window_->extension();
   }
 
   virtual ~ShellWindowGtk();
 
@@ skipping 44 matching lines @@
 
   // The Extension Keybinding Registry responsible for registering listeners for
   // accelerators that are sent to the window, that are destined to be turned
   // into events and sent to the extension.
   scoped_ptr<ExtensionKeybindingRegistryGtk> extension_keybinding_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_EXTENSIONS_SHELL_WINDOW_GTK_H_