Deleted AppListViewDelegateObserver class (was unused).

ui/app_list/views/app_list_view.cc

 // 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.
 
 #include "ui/app_list/views/app_list_view.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 184 matching lines @@
     : delegate_(delegate),
       app_list_main_view_(nullptr),
       speech_view_(nullptr),
       search_box_focus_host_(nullptr),
       search_box_widget_(nullptr),
       search_box_view_(nullptr),
       overlay_view_(nullptr),
       animation_observer_(new HideViewAnimationObserver()) {
   CHECK(delegate);
 
-  delegate_->AddObserver(this);
   delegate_->GetSpeechUI()->AddObserver(this);
 }
 
 AppListView::~AppListView() {
   delegate_->GetSpeechUI()->RemoveObserver(this);
-  delegate_->RemoveObserver(this);
   animation_observer_.reset();
   // Remove child views first to ensure no remaining dependencies on delegate_.
   RemoveAllChildViews(true);
 }
 
 void AppListView::InitAsBubbleAtFixedLocation(
     gfx::NativeView parent,
     int initial_apps_page,
     const gfx::Point& anchor_point_in_screen,
     views::BubbleBorder::Arrow arrow,
@@ skipping 119 matching lines @@
   if (contents_view->custom_page_view() &&
       contents_view->GetActiveState() == AppListModel::STATE_START)
     return !contents_view->custom_page_view()
                 ->GetCollapsedLauncherPageBounds()
                 .Contains(location);
 
   return views::BubbleDialogDelegateView::
       ShouldDescendIntoChildForEventHandling(child, location);
 }
 
-void AppListView::OnShutdown() {
-  // Nothing to do on views - the widget will soon be closed, which will tear
-  // everything down.
-}
-
 void AppListView::SetProfileByPath(const base::FilePath& profile_path) {
   delegate_->SetProfileByPath(profile_path);
   app_list_main_view_->ModelChanged();
 }
 
 void AppListView::AddObserver(AppListViewObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void AppListView::RemoveObserver(AppListViewObserver* observer) {
@@ skipping 340 matching lines @@
     app_list_main_view_->SetVisible(true);
     // Refocus the search box. However, if the app list widget does not have
     // focus, it means another window has already taken focus, and we *must not*
     // focus the search box (or we would steal focus back into the app list).
     if (GetWidget()->IsActive())
       search_box_view_->search_box()->RequestFocus();
   }
 }
 
 }  // namespace app_list