Add a way to fetch window frame metrics from NativeShellWindow

chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.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_COCOA_EXTENSIONS_NATIVE_APP_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_NATIVE_APP_WINDOW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
@@ skipping 92 matching lines @@
   // NativeAppWindow implementation.
   virtual void SetFullscreen(bool fullscreen) OVERRIDE;
   virtual bool IsFullscreenOrPending() const OVERRIDE;
   virtual void UpdateWindowIcon() OVERRIDE;
   virtual void UpdateWindowTitle() OVERRIDE;
   virtual void UpdateDraggableRegions(
       const std::vector<extensions::DraggableRegion>& regions) OVERRIDE;
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void RenderViewHostChanged() OVERRIDE {}
+  virtual gfx::Insets GetFrameInsets() const OVERRIDE;
 
  private:
   virtual ~NativeAppWindowCocoa();
 
   ShellNSWindow* window() const;
 
   content::WebContents* web_contents() const {
     return shell_window_->web_contents();
   }
   const extensions::Extension* extension() const {
@@ skipping 39 matching lines @@
   NSPoint last_mouse_location_;
 
   // The Extension Command Registry used to determine which keyboard events to
   // handle.
   scoped_ptr<ExtensionKeybindingRegistryCocoa> extension_keybinding_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeAppWindowCocoa);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_NATIVE_APP_WINDOW_COCOA_H_