Fix window zoom in a sane way, remove nasty casts.

chrome/browser/ui/cocoa/browser_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_BROWSER_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_
 #pragma once
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 109 matching lines @@
       const GURL& url,
       FullscreenExitBubbleType bubble_type) OVERRIDE;
   virtual void ExitPresentationMode() OVERRIDE;
   virtual bool InPresentationMode() OVERRIDE;
   virtual void ShowInstant(TabContentsWrapper* preview) OVERRIDE;
   virtual void HideInstant() OVERRIDE;
   virtual gfx::Rect GetInstantBounds() OVERRIDE;
   virtual WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds) OVERRIDE;
   virtual FindBar* CreateFindBar() OVERRIDE;
-  virtual void UpdatePreferredSize(content::WebContents* web_contents,
-                                   const gfx::Size& pref_size) OVERRIDE;
   virtual void ShowAvatarBubble(content::WebContents* web_contents,
                                 const gfx::Rect& rect) OVERRIDE;
   virtual void ShowAvatarBubbleFromAvatarButton() OVERRIDE;
 
   // Overridden from NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Adds the given FindBar cocoa controller to this browser window.
@@ skipping 11 matching lines @@
   content::NotificationRegistrar registrar_;
   PrefChangeRegistrar pref_change_registrar_;
   Browser* browser_;  // weak, owned by controller
   BrowserWindowController* controller_;  // weak, owns us
   base::WeakPtrFactory<Browser> confirm_close_factory_;
   scoped_nsobject<NSString> pending_window_title_;
   ui::WindowShowState initial_show_state_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_