ash/mash: Introduce a ShelfDelegate implementation for mash.

ash/mus/shell_delegate_mus.cc

 // Copyright 2016 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/mus/shell_delegate_mus.h"
 
 #include "ash/default_accessibility_delegate.h"
 #include "ash/default_user_wallpaper_delegate.h"
+#include "ash/mus/shelf_delegate_mus.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/system/tray/default_system_tray_delegate.h"
 #include "base/strings/string16.h"
 #include "components/user_manager/user_info_impl.h"
 #include "ui/gfx/image/image.h"
 
 namespace ash {
 namespace sysui {
 
 namespace {
@@ skipping 117 matching lines @@
     VirtualKeyboardStateObserver* observer) {
   NOTIMPLEMENTED();
 }
 
 app_list::AppListViewDelegate* ShellDelegateMus::GetAppListViewDelegate() {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 ShelfDelegate* ShellDelegateMus::CreateShelfDelegate(ShelfModel* model) {
-  NOTIMPLEMENTED();
-  return nullptr;
+  return new ShelfDelegateMus(model);
 }
 
 ash::SystemTrayDelegate* ShellDelegateMus::CreateSystemTrayDelegate() {
   NOTIMPLEMENTED() << " Using the default SystemTrayDelegate implementation";
   return new DefaultSystemTrayDelegate;
 }
 
 ash::UserWallpaperDelegate* ShellDelegateMus::CreateUserWallpaperDelegate() {
   NOTIMPLEMENTED() << " Using the default UserWallpaperDelegate implementation";
   return new DefaultUserWallpaperDelegate();
@@ skipping 37 matching lines @@
   return base::string16();
 }
 
 gfx::Image ShellDelegateMus::GetDeprecatedAcceleratorImage() const {
   NOTIMPLEMENTED();
   return gfx::Image();
 }
 
 }  // namespace sysui
 }  // namespace ash