Revert of Add OnDisplayMetricsChanged in DisplayObserver.

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

 // 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.
 
 #include "chrome/browser/ui/ash/launcher/browser_status_monitor.h"
 
 #include "ash/shelf/shelf_util.h"
 #include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "base/stl_util.h"
@@ skipping 206 matching lines @@
     return;
 
   if (browser->is_type_popup() && browser->is_app())
     RemoveV1AppFromShelf(browser);
   else
     browser->tab_strip_model()->RemoveObserver(this);
 
   UpdateBrowserItemState();
 }
 
+void BrowserStatusMonitor::OnDisplayBoundsChanged(
+    const gfx::Display& display) {
+  // Do nothing here.
+}
+
 void BrowserStatusMonitor::OnDisplayAdded(const gfx::Display& new_display) {
   // Add a new RootWindow and its ActivationClient to observed list.
   aura::Window* root_window = ash::Shell::GetInstance()->
       display_controller()->GetRootWindowForDisplayId(new_display.id());
   // When the primary root window's display get removed, the existing root
   // window is taken over by the new display and the observer is already set.
   if (!observed_root_windows_.IsObserving(root_window)) {
     observed_root_windows_.Add(static_cast<aura::Window*>(root_window));
     observed_activation_clients_.Add(
         aura::client::GetActivationClient(root_window));
   }
 }
 
 void BrowserStatusMonitor::OnDisplayRemoved(const gfx::Display& old_display) {
   // When this is called, RootWindow of |old_display| is already removed.
   // Instead, we can remove RootWindow and its ActivationClient in the
   // OnWindowRemoved().
   // Do nothing here.
 }
 
-void BrowserStatusMonitor::OnDisplayMetricsChanged(const gfx::Display&,
-                                                   uint32_t) {
-  // Do nothing here.
-}
-
 void BrowserStatusMonitor::ActiveTabChanged(content::WebContents* old_contents,
                                             content::WebContents* new_contents,
                                             int index,
                                             int reason) {
   Browser* browser = NULL;
   // Use |new_contents|. |old_contents| could be NULL.
   DCHECK(new_contents);
   browser = chrome::FindBrowserWithWebContents(new_contents);
 
   if (browser && browser->host_desktop_type() != chrome::HOST_DESKTOP_TYPE_ASH)
@@ skipping 119 matching lines @@
     content::WebContents* contents) {
   return launcher_controller_->GetShelfIDForWebContents(contents);
 }
 
 void BrowserStatusMonitor::SetShelfIDForBrowserWindowContents(
     Browser* browser,
     content::WebContents* web_contents) {
   launcher_controller_->GetBrowserShortcutLauncherItemController()->
       SetShelfIDForBrowserWindowContents(browser, web_contents);
 }