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

chrome/browser/tab_contents/tab_contents_view_mac.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_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_
 #pragma once
 
 #if defined(__OBJC__)
 
@@ skipping 101 matching lines @@
                              const gfx::Point& image_offset) OVERRIDE;
   virtual void UpdateDragCursor(WebKit::WebDragOperation operation) OVERRIDE;
   virtual void GotFocus() OVERRIDE;
   virtual void TakeFocus(bool reverse) OVERRIDE;
 
   // A helper method for closing the tab in the
   // CloseTabAfterEventTracking() implementation.
   void CloseTab();
 
   TabContents* tab_contents() { return tab_contents_; }
-  int preferred_width() const { return preferred_width_; }
-  void set_preferred_width(int preferred_width) {
-    preferred_width_ = preferred_width;
-  }
 
  private:
   // The TabContents whose contents we display.
   TabContents* tab_contents_;
 
   // Common implementations of some TabContentsView methods.
   TabContentsViewHelper tab_contents_view_helper_;
 
   // The Cocoa NSView that lives in the view hierarchy.
   scoped_nsobject<TabContentsViewCocoa> cocoa_view_;
 
   // Keeps track of which NSView has focus so we can restore the focus when
   // focus returns.
   scoped_nsobject<FocusTracker> focus_tracker_;
 
   // The context menu. Callbacks are asynchronous so we need to keep it around.
   scoped_ptr<RenderViewContextMenuMac> context_menu_;
 
-  // The page content's intrinsic width.
-  int preferred_width_;
-
   // The overlaid view. Owned by the caller of |InstallOverlayView|; this is a
   // weak reference.
   NSView* overlaid_view_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsViewMac);
 };
 
 #endif  // __OBJC__
 
 // Functions that may be accessed from non-Objective-C C/C++ code.
 class TabContents;
 class TabContentsView;
 
 namespace tab_contents_view_mac {
 TabContentsView* CreateTabContentsView(TabContents* tab_contents);
 }
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_VIEW_MAC_H_