mash: Port context menu code to WmShell and WmRootWindowController.

ash/shell.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.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 246 matching lines @@
 aura::Window* Shell::GetContainer(aura::Window* root_window, int container_id) {
   return root_window->GetChildById(container_id);
 }
 
 // static
 const aura::Window* Shell::GetContainer(const aura::Window* root_window,
                                         int container_id) {
   return root_window->GetChildById(container_id);
 }
 
-void Shell::ShowContextMenu(const gfx::Point& location_in_screen,
-                            ui::MenuSourceType source_type) {
-  // No context menus if there is no session with an active user.
-  if (!session_state_delegate_->NumberOfLoggedInUsers())
-    return;
-  // No context menus when screen is locked.
-  if (session_state_delegate_->IsScreenLocked())
-    return;
-
-  aura::Window* root = WmWindowAura::GetAuraWindow(
-      wm::GetRootWindowMatching(gfx::Rect(location_in_screen, gfx::Size())));
-  GetRootWindowController(root)->ShowContextMenu(location_in_screen,
-                                                 source_type);
-}
-
 views::NonClientFrameView* Shell::CreateDefaultNonClientFrameView(
     views::Widget* widget) {
   // Use translucent-style window frames for dialogs.
   return new CustomFrameViewAsh(widget);
 }
 
 void Shell::SetDisplayWorkAreaInsets(Window* contains,
                                      const gfx::Insets& insets) {
   if (!window_tree_host_manager_->UpdateWorkAreaOfDisplayNearestWindow(
           contains, insets)) {
@@ skipping 684 matching lines @@
 std::unique_ptr<ui::EventTargetIterator> Shell::GetChildIterator() const {
   return std::unique_ptr<ui::EventTargetIterator>();
 }
 
 ui::EventTargeter* Shell::GetEventTargeter() {
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace ash