mash: Migrate shelf menus to wm common types

ash/shell/shell_delegate_impl.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/shell_delegate_impl.h"
 
 #include "ash/app_list/app_list_presenter_delegate_factory.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/default_accessibility_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 248 matching lines @@
 std::unique_ptr<ash::ContainerDelegate>
 ShellDelegateImpl::CreateContainerDelegate() {
   return base::WrapUnique(new ContainerDelegateAura);
 }
 
 std::unique_ptr<ash::PointerWatcherDelegate>
 ShellDelegateImpl::CreatePointerWatcherDelegate() {
   return base::WrapUnique(new PointerWatcherDelegateAura);
 }
 
-ui::MenuModel* ShellDelegateImpl::CreateContextMenu(
-    ash::Shelf* shelf,
-    const ash::ShelfItem* item) {
-  return new ContextMenu(shelf);
+ui::MenuModel* ShellDelegateImpl::CreateContextMenu(WmShelf* wm_shelf,
+                                                    const ShelfItem* item) {
+  return new ContextMenu(wm_shelf);
 }
 
 GPUSupport* ShellDelegateImpl::CreateGPUSupport() {
   // Real GPU support depends on src/content, so just use a stub.
   return new GPUSupportStub;
 }
 
 base::string16 ShellDelegateImpl::GetProductName() const {
   return base::string16();
 }
 
 gfx::Image ShellDelegateImpl::GetDeprecatedAcceleratorImage() const {
   return gfx::Image();
 }
 
 }  // namespace shell
 }  // namespace ash