[cleanup] Remove LauncherItemChanged() from LauncherItemController

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

 // Copyright (c) 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_shortcut_launcher_item_controller.h"
 
 #include <vector>
 
 #include "ash/launcher/launcher.h"
 #include "ash/shell.h"
@@ skipping 90 matching lines @@
     return;
   }
 
   launcher_controller()->ActivateWindowOrMinimizeIfActive(
       last_browser->window(), GetApplicationList(0).size() == 2);
 }
 
 void BrowserShortcutLauncherItemController::Close() {
 }
 
-void BrowserShortcutLauncherItemController::LauncherItemChanged(
-    int model_index,
-    const ash::LauncherItem& old_item) {
-}
-
 void BrowserShortcutLauncherItemController::Clicked(const ui::Event& event) {
   #if defined(OS_CHROMEOS)
     chromeos::default_pinned_apps_field_trial::RecordShelfClick(
         chromeos::default_pinned_apps_field_trial::CHROME);
   #endif
 
   if (event.flags() & ui::EF_CONTROL_DOWN) {
     launcher_controller()->CreateNewWindow();
     return;
   }
@@ skipping 129 matching lines @@
                                           chrome::HOST_DESKTOP_TYPE_ASH);
       if (!browser ||
           !launcher_controller()->IsBrowserRepresentedInBrowserList(browser))
         browser = items[0];
     }
   }
   DCHECK(browser);
   browser->window()->Show();
   browser->window()->Activate();
 }