Replace ShelfItemDelegate::GetTitle() with ShelfItem::title.

ash/shell/window_watcher.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/shell/window_watcher.h"
 
 #include <utility>
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/shelf/shelf_model.h"
@@ skipping 92 matching lines @@
                   : ash::TYPE_APP;
   ash::ShelfID id = model->next_id();
   id_to_window_[id] = new_window;
 
   SkBitmap icon_bitmap;
   icon_bitmap.allocN32Pixels(16, 16);
   icon_bitmap.eraseARGB(255, image_count == 0 ? 255 : 0,
                         image_count == 1 ? 255 : 0, image_count == 2 ? 255 : 0);
   image_count = (image_count + 1) % 3;
   item.image = gfx::ImageSkia(gfx::ImageSkiaRep(icon_bitmap, 1.0f));
+  item.title = new_window->GetTitle();
 
   model->Add(item);
 
   std::unique_ptr<ShelfItemDelegate> delegate(
       new WindowWatcherShelfItemDelegate(id, this));
   model->SetShelfItemDelegate(id, std::move(delegate));
   WmWindowAura::Get(new_window)->SetIntProperty(WmWindowProperty::SHELF_ID, id);
 }
 
 void WindowWatcher::OnWillRemoveWindow(aura::Window* window) {
@@ skipping 20 matching lines @@
 void WindowWatcher::OnDisplayRemoved(const display::Display& old_display) {
   // All windows in the display has already been removed, so no need to
   // remove observers.
 }
 
 void WindowWatcher::OnDisplayMetricsChanged(const display::Display&, uint32_t) {
 }
 
 }  // namespace shell
 }  // namespace ash