Extract touchscreen device management into a generic manager

ash/shell.h

 // 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.
 
 #ifndef ASH_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 357 matching lines @@
   WindowCycleController* window_cycle_controller() {
     return window_cycle_controller_.get();
   }
   WindowSelectorController* window_selector_controller() {
     return window_selector_controller_.get();
   }
   FocusCycler* focus_cycler() { return focus_cycler_.get(); }
   DisplayController* display_controller() {
     return display_controller_.get();
   }
-#if defined(OS_CHROMEOS) && defined(USE_X11)
+#if defined(OS_CHROMEOS)
   TouchTransformerController* touch_transformer_controller() {
     return touch_transformer_controller_.get();
   }
-#endif  // defined(OS_CHROMEOS) && defined(USE_X11)
+#endif  // defined(OS_CHROMEOS)
   MouseCursorEventFilter* mouse_cursor_filter() {
     return mouse_cursor_filter_.get();
   }
   EventTransformationHandler* event_transformation_handler() {
     return event_transformation_handler_.get();
   }
   ::wm::CursorManager* cursor_manager() { return &cursor_manager_; }
 
   ShellDelegate* delegate() { return delegate_.get(); }
 
@@ skipping 321 matching lines @@
   scoped_ptr<LastWindowClosedLogoutReminder>
       last_window_closed_logout_reminder_;
   // Controls video output device state.
   scoped_ptr<ui::DisplayConfigurator> display_configurator_;
   scoped_ptr<DisplayConfiguratorAnimation> display_configurator_animation_;
   scoped_ptr<DisplayErrorObserver> display_error_observer_;
   scoped_ptr<ProjectingObserver> projecting_observer_;
 
   // Listens for output changes and updates the display manager.
   scoped_ptr<DisplayChangeObserver> display_change_observer_;
+  scoped_ptr<TouchTransformerController> touch_transformer_controller_;
 
 #if defined(USE_X11)
   scoped_ptr<ui::EventHandler> magnifier_key_scroll_handler_;
   scoped_ptr<ui::EventHandler> speech_feedback_handler_;
-  scoped_ptr<TouchTransformerController> touch_transformer_controller_;
 #endif  // defined(USE_X11)
 #endif  // defined(OS_CHROMEOS)
 
   scoped_ptr<MaximizeModeController> maximize_mode_controller_;
 
   // |native_cursor_manager_| is owned by |cursor_manager_|, but we keep a
   // pointer to vend to test code.
   AshNativeCursorManager* native_cursor_manager_;
 
 // Cursor may be hidden on certain key events in ChromeOS, whereas we never hide
@@ skipping 13 matching lines @@
 
   // Injected content::GPUDataManager support.
   scoped_ptr<GPUSupport> gpu_support_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_