mash: Move ShelfWindowWatcher[ItemDelegate] to ash/common.

ash/common/wm_shell.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/common/wm_shell.h"
 
 #include <utility>
 
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/accelerators/ash_focus_manager_factory.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/focus_cycler.h"
 #include "ash/common/keyboard/keyboard_ui.h"
 #include "ash/common/new_window_delegate.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/app_list_shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/shelf/shelf_model.h"
+#include "ash/common/shelf/shelf_window_watcher.h"
 #include "ash/common/shell_delegate.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/system/brightness_control_delegate.h"
 #include "ash/common/system/keyboard_brightness_control_delegate.h"
 #include "ash/common/system/toast/toast_manager.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm/mru_window_tracker.h"
 #include "ash/common/wm/overview/window_selector_controller.h"
@@ skipping 39 matching lines @@
   // Install the custom factory early on so that views::FocusManagers for Tray,
   // Shelf, and WallPaper could be created by the factory.
   views::FocusManagerFactory::Install(new AshFocusManagerFactory);
 
   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
 }
 
 void WmShell::Shutdown() {
   // Accesses WmShell in its destructor.
   accessibility_delegate_.reset();
+  // ShelfWindowWatcher has window observers and a pointer to the shelf model.
+  shelf_window_watcher_.reset();
   // ShelfItemDelegate subclasses it owns have complex cleanup to run (e.g. ARC
   // shelf items in Chrome) so explicitly shutdown early.
   shelf_model_->DestroyItemDelegates();
   // Must be destroyed before FocusClient.
   shelf_delegate_.reset();
 
   // Balances the Install() in Initialize().
   views::FocusManagerFactory::Install(nullptr);
 }
 
@@ skipping 137 matching lines @@
 void WmShell::CreateShelfDelegate() {
   // May be called multiple times as shelves are created and destroyed.
   if (shelf_delegate_)
     return;
   // Must occur after SessionStateDelegate creation and user login because
   // Chrome's implementation of ShelfDelegate assumes it can get information
   // about multi-profile login state.
   DCHECK(GetSessionStateDelegate());
   DCHECK_GT(GetSessionStateDelegate()->NumberOfLoggedInUsers(), 0);
   shelf_delegate_.reset(delegate_->CreateShelfDelegate(shelf_model_.get()));
+  shelf_window_watcher_.reset(new ShelfWindowWatcher(shelf_model_.get()));
 }
 
 void WmShell::DeleteWindowCycleController() {
   window_cycle_controller_.reset();
 }
 
 void WmShell::DeleteWindowSelectorController() {
   window_selector_controller_.reset();
 }
 
@@ skipping 16 matching lines @@
 void WmShell::DeleteToastManager() {
   toast_manager_.reset();
 }
 
 void WmShell::SetAcceleratorController(
     std::unique_ptr<AcceleratorController> accelerator_controller) {
   accelerator_controller_ = std::move(accelerator_controller);
 }
 
 }  // namespace ash