Revert 152080 - Refactor browser window zoom handling and enable zoom icon on all platforms.

chrome/browser/ui/cocoa/location_bar/zoom_decoration.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_LOCATION_BAR_ZOOM_DECORATION_H_
-#define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_ZOOM_DECORATION_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/basictypes.h"
-#include "chrome/browser/ui/cocoa/location_bar/image_decoration.h"
-
-class ToolbarModel;
-class ZoomController;
-
-// Zoom icon at the end of the omnibox (close to page actions) when at a
-// non-standard zoom level.
-// TODO(dbeam): add mouse event handlers to show a zoom bubble on click.
-class ZoomDecoration : public ImageDecoration {
- public:
-  explicit ZoomDecoration(ToolbarModel* toolbar_model);
-  virtual ~ZoomDecoration();
-
-  // Called when this decoration should show or hide itself in its most current
-  // state.
-  void Update(ZoomController* zoom_controller);
-
- private:
-  // LocationBarDecoration implementation.
-  virtual bool AcceptsMousePress() OVERRIDE;
-  virtual NSString* GetToolTip() OVERRIDE;
-
-  // A reference to the toolbar model to query whether input is currently
-  // happening in the location bar. Not owned by this class.
-  ToolbarModel* toolbar_model_;
-
-  // The string to show for a tooltip.
-  scoped_nsobject<NSString> tooltip_;
-
-  DISALLOW_COPY_AND_ASSIGN(ZoomDecoration);
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_ZOOM_DECORATION_H_