Move ZoomObserver, ZoomController and ZoomEventManager to components/.

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"
 #import "chrome/browser/ui/cocoa/browser/zoom_bubble_controller.h"
 #include "chrome/browser/ui/cocoa/location_bar/image_decoration.h"
 
 class LocationBarViewMac;
 @class ZoomBubbleController;
+class ZoomDecorationTest;
+
+namespace ui_zoom {
 class ZoomController;
-class ZoomDecorationTest;
+}
 
 // Zoom icon at the end of the omnibox (close to page actions) when at a
 // non-standard zoom level.
 class ZoomDecoration : public ImageDecoration,
                        public ZoomBubbleControllerDelegate {
  public:
   explicit ZoomDecoration(LocationBarViewMac* owner);
   ~ZoomDecoration() override;
 
   // Called when this decoration should show or hide itself in its most current
   // state. Returns whether any updates were made.
-  bool UpdateIfNecessary(ZoomController* zoom_controller);
+  bool UpdateIfNecessary(ui_zoom::ZoomController* zoom_controller);
 
   // Shows the zoom bubble for this decoration. If |auto_close| is YES, then
   // the bubble will automatically close after a fixed period of time.
   void ShowBubble(BOOL auto_close);
 
   // Closes the zoom bubble.
   void CloseBubble();
 
  protected:
   // Hides all UI associated with the zoom decoration.
   // Virtual and protected for testing.
   virtual void HideUI();
 
   // Show and update UI associated with the zoom decoration.
   // Virtual and protected for testing.
-  virtual void ShowAndUpdateUI(ZoomController* zoom_controller,
+  virtual void ShowAndUpdateUI(ui_zoom::ZoomController* zoom_controller,
                                NSString* tooltip_string);
 
  private:
   friend ZoomDecorationTest;
 
   bool IsAtDefaultZoom() const;
 
   // Virtual for testing.
   virtual bool ShouldShowDecoration() const;
 
@@ skipping 13 matching lines @@
   // The bubble that this decoration shows. Weak, owns self.
   ZoomBubbleController* bubble_;
 
   // The string to show for a tooltip.
   base::scoped_nsobject<NSString> tooltip_;
 
   DISALLOW_COPY_AND_ASSIGN(ZoomDecoration);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_ZOOM_DECORATION_H_