Revert 226547 "Refactor LauncherItemController and LauncherItemD..."

trunk/src/ash/launcher/launcher_item_delegate_manager.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 "ash/launcher/launcher_item_delegate_manager.h"
 
-#include "ash/launcher/launcher_item_delegate.h"
-#include "ash/launcher/launcher_model.h"
-#include "ash/shell.h"
 #include "base/logging.h"
-#include "base/stl_util.h"
 
 namespace ash {
 
-LauncherItemDelegateManager::LauncherItemDelegateManager(
-    ash::LauncherModel* model) : model_(model) {
-  DCHECK(model_);
-  model_->AddObserver(this);
+LauncherItemDelegateManager::LauncherItemDelegateManager() {
 }
 
 LauncherItemDelegateManager::~LauncherItemDelegateManager() {
-  model_->RemoveObserver(this);
-  STLDeleteContainerPairSecondPointers(id_to_item_delegate_map_.begin(),
-                                       id_to_item_delegate_map_.end());
 }
 
-void LauncherItemDelegateManager::SetLauncherItemDelegate(
-    ash::LauncherID id,
-    scoped_ptr<LauncherItemDelegate> item_delegate) {
-  // If another LauncherItemDelegate is already registered for |id|, we assume
-  // that this request is replacing LauncherItemDelegate for |id| with
-  // |item_delegate|.
-  RemoveLauncherItemDelegate(id);
-  id_to_item_delegate_map_[id] = item_delegate.release();
+void LauncherItemDelegateManager::RegisterLauncherItemDelegate(
+    ash::LauncherItemType type, LauncherItemDelegate* item_delegate) {
+  // When a new |item_delegate| is registered with an exsiting |type|, it will
+  // get overwritten.
+  item_type_to_item_delegate_map_[type] = item_delegate;
 }
 
 LauncherItemDelegate* LauncherItemDelegateManager::GetLauncherItemDelegate(
-    ash::LauncherID id) {
-  if (id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end())
-    return id_to_item_delegate_map_[id];
-  return NULL;
-}
-
-void LauncherItemDelegateManager::LauncherItemAdded(int index) {
-}
-
-void LauncherItemDelegateManager::LauncherItemRemoved(int index,
-                                                      ash::LauncherID id) {
-  RemoveLauncherItemDelegate(id);
-}
-
-void LauncherItemDelegateManager::LauncherItemMoved(int start_index,
-                                                    int target_index) {
-}
-
-void LauncherItemDelegateManager::LauncherItemChanged(
-    int index,
-    const LauncherItem& old_item) {
-}
-
-void LauncherItemDelegateManager::LauncherStatusChanged() {
-}
-
-void LauncherItemDelegateManager::RemoveLauncherItemDelegate(
-    ash::LauncherID id) {
-  if (id_to_item_delegate_map_.find(id) != id_to_item_delegate_map_.end()) {
-    delete id_to_item_delegate_map_[id];
-    id_to_item_delegate_map_.erase(id);
-  }
+    ash::LauncherItemType item_type) {
+  DCHECK(item_type_to_item_delegate_map_.find(item_type) !=
+      item_type_to_item_delegate_map_.end());
+  return item_type_to_item_delegate_map_[item_type];
 }
 
 }  // namespace ash