Move ZoomObserver, ZoomController and ZoomEventManager to components/.

chrome/browser/ui/zoom/zoom_observer.h

Index: chrome/browser/ui/zoom/zoom_observer.h
diff --git a/chrome/browser/ui/zoom/zoom_observer.h b/chrome/browser/ui/zoom/zoom_observer.h
deleted file mode 100644
index b43dbcbbc41175d74666e6ae6c9e83fc3c2a6bab..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/zoom/zoom_observer.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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_ZOOM_ZOOM_OBSERVER_H_
-#define CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_
-
-#include "chrome/browser/ui/zoom/zoom_controller.h"
-
-namespace content {
-class WebContents;
-}
-
-// Interface for objects that wish to be notified of changes in ZoomController.
-class ZoomObserver {
- public:
-  // Notification that the zoom percentage has changed.
-  virtual void OnZoomChanged(const ZoomController::ZoomChangedEventData& data) {
-  }
-
- protected:
-  virtual ~ZoomObserver() {}
-};
-
-#endif  // CHROME_BROWSER_UI_ZOOM_ZOOM_OBSERVER_H_