Moves WorkspaceEventHandler to ash/common

ash/common/wm_shell.h

 // 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.
 
 #ifndef ASH_COMMON_WM_SHELL_H_
 #define ASH_COMMON_WM_SHELL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 46 matching lines @@
 class SystemTrayNotifier;
 class ToastManager;
 class WallpaperDelegate;
 class WindowCycleController;
 class WindowCycleEventFilter;
 class WindowResizer;
 class WindowSelectorController;
 class WmActivationObserver;
 class WmDisplayObserver;
 class WmWindow;
+class WorkspaceEventHandler;
 
 enum class TaskSwitchSource;
 
 namespace wm {
 class MaximizeModeEventHandler;
 class WindowState;
 }
 
 #if defined(OS_CHROMEOS)
 class LogoutConfirmationController;
@@ skipping 186 matching lines @@
   virtual std::unique_ptr<WindowResizer> CreateDragWindowResizer(
       std::unique_ptr<WindowResizer> next_window_resizer,
       wm::WindowState* window_state) = 0;
 
   virtual std::unique_ptr<WindowCycleEventFilter>
   CreateWindowCycleEventFilter() = 0;
 
   virtual std::unique_ptr<wm::MaximizeModeEventHandler>
   CreateMaximizeModeEventHandler() = 0;
 
+  // This may return null.

[James Cook, 2016/08/26 19:07:16]

In tests? In this CL it's non-null for both aura and mus.

[sky, 2016/08/26 20:19:16]

I'm going to remove the comment now that it always returns non-null.

+  virtual std::unique_ptr<WorkspaceEventHandler> CreateWorkspaceEventHandler(
+      WmWindow* workspace_window) = 0;
+
   virtual std::unique_ptr<ScopedDisableInternalMouseAndKeyboard>
   CreateScopedDisableInternalMouseAndKeyboard() = 0;
 
   virtual std::unique_ptr<ImmersiveFullscreenController>
   CreateImmersiveFullscreenController() = 0;
 
   void CreateShelfDelegate();
 
   // Called after maximize mode has started, windows might still animate though.
   void OnMaximizeModeStarted();
@@ skipping 141 matching lines @@
   bool simulate_modal_window_open_for_testing_ = false;
 
 #if defined(OS_CHROMEOS)
   std::unique_ptr<LogoutConfirmationController> logout_confirmation_controller_;
 #endif
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_SHELL_H_