Revert 115515 - [Aura] Implement views-based applist.

ui/aura_shell/app_list/app_list_item_model.cc

-// Copyright (c) 2011 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/aura_shell/app_list/app_list_item_model.h"
-
-#include "ui/aura_shell/app_list/app_list_item_model_observer.h"
-
-namespace aura_shell {
-
-AppListItemModel::AppListItemModel() {
-}
-
-AppListItemModel::~AppListItemModel() {
-}
-
-void AppListItemModel::SetIcon(const SkBitmap& icon) {
-  icon_ = icon;
-  FOR_EACH_OBSERVER(AppListItemModelObserver, observers_,
-                    ItemIconChanged());
-}
-
-void AppListItemModel::SetTitle(const std::string& title) {
-  title_ = title;
-  FOR_EACH_OBSERVER(AppListItemModelObserver, observers_,
-                    ItemTitleChanged());
-}
-
-void AppListItemModel::AddObserver(AppListItemModelObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void AppListItemModel::RemoveObserver(AppListItemModelObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-}  // namespace aura_shell