ash: Rename LauncherIconObserver to ShelfIconObserver.

ash/launcher/launcher.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 "ash/launcher/launcher.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "ash/focus_cycler.h"
@@ skipping 103 matching lines @@
   item_delegate->ItemSelected(event);
 }
 
 void Launcher::CycleWindowLinear(CycleDirection direction) {
   int item_index = GetNextActivatedItemIndex(
       *(shelf_view_->model()), direction);
   if (item_index >= 0)
     ActivateLauncherItem(item_index);
 }
 
-void Launcher::AddIconObserver(LauncherIconObserver* observer) {
+void Launcher::AddIconObserver(ShelfIconObserver* observer) {
   shelf_view_->AddIconObserver(observer);
 }
 
-void Launcher::RemoveIconObserver(LauncherIconObserver* observer) {
+void Launcher::RemoveIconObserver(ShelfIconObserver* observer) {
   shelf_view_->RemoveIconObserver(observer);
 }
 
 bool Launcher::IsShowingMenu() const {
   return shelf_view_->IsShowingMenu();
 }
 
 bool Launcher::IsShowingOverflowBubble() const {
   return shelf_view_->IsShowingOverflowBubble();
 }
@@ skipping 49 matching lines @@
 
 gfx::Rect Launcher::GetVisibleItemsBoundsInScreen() const {
   return shelf_view_->GetVisibleItemsBoundsInScreen();
 }
 
 app_list::ApplicationDragAndDropHost* Launcher::GetDragAndDropHostForAppList() {
   return shelf_view_;
 }
 
 }  // namespace ash