Deleted AppListViewDelegateObserver class (was unused).

ui/app_list/app_list_view_delegate.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 UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 14 matching lines @@
 
 #if defined(TOOLKIT_VIEWS)
 namespace views {
 class View;
 }
 #endif
 
 namespace app_list {
 
 class AppListModel;
-class AppListViewDelegateObserver;
 class SearchResult;
 class SpeechUIModel;
 
 class APP_LIST_EXPORT AppListViewDelegate {
  public:
   // A user of the app list.
   struct APP_LIST_EXPORT User {
     User();
     User(const User& other);
     ~User();
@@ skipping 93 matching lines @@
 
   // Invoked when the custom launcher page's subpage should be popped.
   virtual void CustomLauncherPagePopSubpage() = 0;
 #endif
 
   // Returns true if the delegate supports speech recognition.
   virtual bool IsSpeechRecognitionEnabled() = 0;
 
   // Returns the list of users (for AppListMenu).
   virtual const Users& GetUsers() const = 0;
-
-  // Adds/removes an observer for profile changes.
-  virtual void AddObserver(AppListViewDelegateObserver* observer) {}
-  virtual void RemoveObserver(AppListViewDelegateObserver* observer) {}
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_