Adds AppListDelegate to AppList that is notified on visibility changes

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>
 
 #include "ash/accelerators/accelerator_controller_delegate_aura.h"
 #include "ash/accelerators/accelerator_delegate.h"
 #include "ash/accelerators/magnifier_key_scroller.h"
 #include "ash/accelerators/spoken_feedback_toggler.h"
+#include "ash/app_list/app_list_delegate_impl.h"
 #include "ash/aura/wm_shell_aura.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/common/accelerators/accelerator_controller.h"
 #include "ash/common/ash_constants.h"
 #include "ash/common/frame/custom_frame_view_ash.h"
 #include "ash/common/gpu_support.h"
 #include "ash/common/keyboard/keyboard_ui.h"
 #include "ash/common/login_status.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/app_list_shelf_item_delegate.h"
@@ skipping 498 matching lines @@
   laser_pointer_controller_.reset();
   partial_magnification_controller_.reset();
 
   // This also deletes all RootWindows. Note that we invoke Shutdown() on
   // WindowTreeHostManager before resetting |window_tree_host_manager_|, since
   // destruction
   // of its owned RootWindowControllers relies on the value.
   ScreenAsh::CreateScreenForShutdown();
   display_configuration_controller_.reset();
 
+  // AppListDelegateImpl depends upon AppList.
+  app_list_delegate_impl_.reset();
+
   wm_shell_->Shutdown();
   // Depends on |focus_client_|, so must be destroyed before.
   window_tree_host_manager_.reset();
   focus_client_.reset();
   screen_position_controller_.reset();
 
   keyboard::KeyboardController::ResetInstance(nullptr);
 
   display_color_manager_.reset();
   if (display_change_observer_)
@@ skipping 17 matching lines @@
 
   DCHECK(instance_ == this);
   instance_ = nullptr;
 }
 
 void Shell::Init(const ShellInitParams& init_params) {
   const bool is_mash = wm_shell_->IsRunningInMash();
 
   wm_shell_->Initialize(init_params.blocking_pool);
 
+  if (is_mash)
+    app_list_delegate_impl_ = base::MakeUnique<AppListDelegateImpl>();
+
   // TODO(sky): move creation to WmShell.
   if (!is_mash)
     immersive_handler_factory_ = base::MakeUnique<ImmersiveHandlerFactoryAsh>();
 
   scoped_overview_animation_settings_factory_.reset(
       new ScopedOverviewAnimationSettingsFactoryAura);
   window_positioner_.reset(new WindowPositioner(wm_shell_.get()));
 
   if (!is_mash) {
     native_cursor_manager_ = new AshNativeCursorManager;
@@ skipping 337 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