Consolidate ShouldUseNativeFrame/AlwaysUseNativeFrame/UseNativeFrame spaghetti.

chrome/browser/ui/views/frame/browser_frame_win.h

 // Copyright (c) 2011 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_VIEWS_FRAME_BROWSER_FRAME_WIN_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_WIN_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "chrome/browser/ui/views/frame/browser_frame.h"
@@ skipping 25 matching lines @@
   // Overridden from views::WindowWin:
   virtual int GetShowState() const OVERRIDE;
   virtual gfx::Insets GetClientAreaInsets() const OVERRIDE;
   virtual void UpdateFrameAfterFrameChange() OVERRIDE;
   virtual void OnEndSession(BOOL ending, UINT logoff) OVERRIDE;
   virtual void OnInitMenuPopup(HMENU menu,
                                UINT position,
                                BOOL is_system_menu) OVERRIDE;
   virtual void OnWindowPosChanged(WINDOWPOS* window_pos) OVERRIDE;
   virtual void OnScreenReaderDetected() OVERRIDE;
+  virtual bool ShouldUseNativeFrame() const OVERRIDE;
 
   // Overridden from NativeBrowserFrame:
   virtual views::NativeWindow* AsNativeWindow() OVERRIDE;
   virtual const views::NativeWindow* AsNativeWindow() const OVERRIDE;
   virtual int GetMinimizeButtonOffset() const OVERRIDE;
   virtual void TabStripDisplayModeChanged() OVERRIDE;
 
  private:
   // Updates the DWM with the frame bounds.
   void UpdateDWMFrame();
 
   // The BrowserView is our ClientView. This is a pointer to it.
   BrowserView* browser_view_;
 
   BrowserFrame* browser_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserFrameWin);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_WIN_H_