mus: Add PointerWatcher for passively observing mouse and touch events

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 19 matching lines @@
 #include "ash/gpu_support.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/host/ash_window_tree_host_init_params.h"
 #include "ash/ime/input_method_event_handler.h"
 #include "ash/keyboard/keyboard_ui.h"
 #include "ash/keyboard_uma_event_filter.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/media_delegate.h"
 #include "ash/new_window_delegate.h"
+#include "ash/pointer_watcher_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/app_list_shelf_item_delegate.h"
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_delegate.h"
 #include "ash/shelf/shelf_item_delegate.h"
 #include "ash/shelf/shelf_item_delegate_manager.h"
 #include "ash/shelf/shelf_model.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shelf/shelf_window_watcher.h"
@@ skipping 434 matching lines @@
 }
 
 void Shell::AddShellObserver(ShellObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void Shell::RemoveShellObserver(ShellObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
+void Shell::AddPointerWatcher(views::PointerWatcher* watcher) {
+  pointer_watcher_delegate_->AddPointerWatcher(watcher);
+}
+
+void Shell::RemovePointerWatcher(views::PointerWatcher* watcher) {
+  pointer_watcher_delegate_->RemovePointerWatcher(watcher);
+}
+
 #if defined(OS_CHROMEOS)
 bool Shell::ShouldSaveDisplaySettings() {
   return !(screen_orientation_controller_
                ->ignore_display_configuration_updates() ||
            resolution_notification_controller_->DoesNotificationTimeout());
 }
 #endif
 
 void Shell::UpdateShelfVisibility() {
   RootWindowControllerList controllers = GetAllRootWindowControllers();
@@ skipping 318 matching lines @@
   wm_globals_.reset();
 
   // Depends on |focus_client_|, so must be destroyed before.
   window_tree_host_manager_->Shutdown();
   window_tree_host_manager_.reset();
   focus_client_.reset();
   screen_position_controller_.reset();
   accessibility_delegate_.reset();
   new_window_delegate_.reset();
   media_delegate_.reset();
+  pointer_watcher_delegate_.reset();
 
   keyboard::KeyboardController::ResetInstance(nullptr);
 
 #if defined(OS_CHROMEOS)
   display_color_manager_.reset();
   if (display_change_observer_)
     display_configurator_->RemoveObserver(display_change_observer_.get());
   if (display_error_observer_)
     display_configurator_->RemoveObserver(display_error_observer_.get());
   if (projecting_observer_) {
@@ skipping 217 matching lines @@
 
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(
       new DesktopBackgroundController(blocking_pool_));
   user_wallpaper_delegate_.reset(delegate_->CreateUserWallpaperDelegate());
 
   session_state_delegate_.reset(delegate_->CreateSessionStateDelegate());
   accessibility_delegate_.reset(delegate_->CreateAccessibilityDelegate());
   new_window_delegate_.reset(delegate_->CreateNewWindowDelegate());
   media_delegate_.reset(delegate_->CreateMediaDelegate());
+  pointer_watcher_delegate_ = delegate_->CreatePointerWatcherDelegate();
 
   resize_shadow_controller_.reset(new ResizeShadowController());
   shadow_controller_.reset(
       new ::wm::ShadowController(activation_client_));
 
   // Create system_tray_notifier_ before the delegate.
   system_tray_notifier_.reset(new SystemTrayNotifier());
 
   // Initialize system_tray_delegate_ before initializing StatusAreaWidget.
   system_tray_delegate_.reset(delegate()->CreateSystemTrayDelegate());
@@ skipping 158 matching lines @@
 
 void Shell::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   if (gained_active)
     target_root_window_ = gained_active->GetRootWindow();
 }
 
 }  // namespace ash