Revert of Add OnDisplayMetricsChanged in DisplayObserver.

chrome/browser/ui/ash/launcher/browser_status_monitor.h

 // Copyright 2013 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_ASH_LAUNCHER_BROWSER_STATUS_MONITOR_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_BROWSER_STATUS_MONITOR_H_
 
 #include <map>
 #include <string>
 
@@ skipping 49 matching lines @@
                                  aura::Window* lost_active) OVERRIDE;
 
   // aura::WindowObserver overrides:
   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
 
   // chrome::BrowserListObserver overrides:
   virtual void OnBrowserAdded(Browser* browser) OVERRIDE;
   virtual void OnBrowserRemoved(Browser* browser) OVERRIDE;
 
   // gfx::DisplayObserver overrides:
+  virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE;
   virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE;
   virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE;
-  virtual void OnDisplayMetricsChanged(const gfx::Display& display,
-                                       uint32_t metrics) OVERRIDE;
 
   // TabStripModelObserver overrides:
   virtual void ActiveTabChanged(content::WebContents* old_contents,
                                 content::WebContents* new_contents,
                                 int index,
                                 int reason) OVERRIDE;
   virtual void TabReplacedAt(TabStripModel* tab_strip_model,
                              content::WebContents* old_contents,
                              content::WebContents* new_contents,
                              int index) OVERRIDE;
@@ skipping 52 matching lines @@
   ScopedObserver<aura::Window, aura::WindowObserver> observed_root_windows_;
 
   BrowserToAppIDMap browser_to_app_id_map_;
   WebContentsToObserverMap webcontents_to_observer_map_;
   scoped_ptr<SettingsWindowObserver> settings_window_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserStatusMonitor);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_BROWSER_STATUS_MONITOR_H_