Add the partial screen magnifier to Chrome OS.

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 50 matching lines @@
 }
 
 namespace ash {
 
 class AcceleratorController;
 class CapsLockDelegate;
 class DesktopBackgroundController;
 class DisplayController;
 class HighContrastController;
 class Launcher;
+class MagnificationController;
 class NestedDispatcherController;
+class PartialMagnificationController;
 class PowerButtonController;
 class ScreenAsh;
 class SessionStateController;
 class ShellDelegate;
 class ShellObserver;
 class SystemTray;
 class SystemTrayDelegate;
 class SystemTrayNotifier;
 class UserActivityDetector;
 class UserWallpaperDelegate;
 class VideoDetector;
 class WebNotificationTray;
 class WindowCycleController;
 
 namespace internal {
 class AcceleratorFilter;
 class ActivationController;
 class AppListController;
 class CaptureController;
 class DisplayChangeObserverX11;
 class DisplayManager;
 class DragDropController;
 class EventClientImpl;
 class EventRewriterEventFilter;
 class FocusCycler;
-class MagnificationController;
 class MouseCursorEventFilter;
 class OutputConfiguratorAnimation;
 class OverlayEventFilter;
 class ResizeShadowController;
 class RootWindowController;
 class RootWindowLayoutManager;
 class ScreenPositionController;
 class SlowAnimationEventFilter;
 class StatusAreaWidget;
 class SystemGestureEventFilter;
@@ skipping 208 matching lines @@
   }
 
   CapsLockDelegate* caps_lock_delegate() {
     return caps_lock_delegate_.get();
   }
 
   HighContrastController* high_contrast_controller() {
     return high_contrast_controller_.get();
   }
 
-  internal::MagnificationController* magnification_controller() {
+  MagnificationController* magnification_controller() {
     return magnification_controller_.get();
   }
 
+  PartialMagnificationController* partial_magnification_controller() {
+    return partial_magnification_controller_.get();
+  }
+
   ScreenAsh* screen() { return screen_; }
 
   // Force the shelf to query for it's current visibility state.
   void UpdateShelfVisibility();
 
   // TODO(oshima): Define an interface to access shelf/launcher
   // state, or just use Launcher.
 
   // Sets/gets the shelf auto-hide behavior on |root_window|.
   void SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior,
@@ skipping 147 matching lines @@
   scoped_ptr<internal::VisibilityController> visibility_controller_;
   scoped_ptr<DesktopBackgroundController> desktop_background_controller_;
   scoped_ptr<PowerButtonController> power_button_controller_;
   scoped_ptr<SessionStateController> session_state_controller_;
   scoped_ptr<UserActivityDetector> user_activity_detector_;
   scoped_ptr<VideoDetector> video_detector_;
   scoped_ptr<WindowCycleController> window_cycle_controller_;
   scoped_ptr<internal::FocusCycler> focus_cycler_;
   scoped_ptr<DisplayController> display_controller_;
   scoped_ptr<HighContrastController> high_contrast_controller_;
-  scoped_ptr<internal::MagnificationController> magnification_controller_;
+  scoped_ptr<MagnificationController> magnification_controller_;
+  scoped_ptr<PartialMagnificationController> partial_magnification_controller_;
   scoped_ptr<aura::FocusManager> focus_manager_;
   scoped_ptr<aura::client::UserActionClient> user_action_client_;
   scoped_ptr<internal::MouseCursorEventFilter> mouse_cursor_filter_;
   scoped_ptr<internal::ScreenPositionController> screen_position_controller_;
   scoped_ptr<internal::SystemModalContainerEventFilter> modality_filter_;
   scoped_ptr<internal::EventClientImpl> event_client_;
 
   // An event filter that rewrites or drops an event.
   scoped_ptr<internal::EventRewriterEventFilter> event_rewriter_filter_;
 
@@ skipping 37 matching lines @@
 
   // For testing only: simulate that a modal window is open
   bool simulate_modal_window_open_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_