Cleanup: remove GTK stuff

chrome/browser/ui/views/frame/browser_non_client_frame_view.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_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/window/non_client_view.h"
@@ skipping 17 matching lines @@
   // Returns the y coordinate within the window at which the tab strip begins.
   // If |as_restored| is true, this is calculated as if we were in restored mode
   // regardless of the current mode. This is used to correctly align theme
   // images.
   virtual int GetHorizontalTabStripVerticalOffset(
       bool force_restored) const = 0;
 
   // Updates the throbber.
   virtual void UpdateThrobber(bool running) = 0;
 
-#if defined(OS_WIN)
-  // Overriden from views::View. For some reason just the do-nothing override
-  // causes view's gtk version to crash. TODO(cpu): remove ifdef when
-  // views:gtk is gone.
+  // Overriden from views::View.
   virtual void VisibilityChanged(views::View* starting_from,
                                  bool is_visible) OVERRIDE;
-#endif
 
  protected:
   BrowserView* browser_view() const { return browser_view_; }
   BrowserFrame* frame() const { return frame_; }
 
   // Updates the title and icon of the avatar button.
   void UpdateAvatarInfo();
 
  private:
   // The frame that hosts this view.
   BrowserFrame* frame_;
 
   // The BrowserView hosted within this View.
   BrowserView* browser_view_;
 
   // Menu button that displays that either the incognito icon or the profile
   // icon.  May be NULL for some frame styles.
   scoped_ptr<AvatarMenuButton> avatar_button_;
 };
 
 namespace browser {
 
 // Provided by a browser_non_client_frame_view_factory_*.cc implementation
 BrowserNonClientFrameView* CreateBrowserNonClientFrameView(
     BrowserFrame* frame, BrowserView* browser_view);
 
 }  // browser
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_H_