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 71 matching lines @@
 class AppListController;
 class CaptureController;
 class DragDropController;
 class EventRewriterEventFilter;
 class FocusCycler;
 class MagnificationController;
 class MouseCursorEventFilter;
 class OutputConfiguratorAnimation;
 class OverlayEventFilter;
 class PanelLayoutManager;
+class PartialMagnificationController;
 class ResizeShadowController;
 class RootWindowController;
 class RootWindowLayoutManager;
 class ScreenPositionController;
 class ShadowController;
 class ShelfLayoutManager;
 class ShellContextMenu;
 class SlowAnimationEventFilter;
 class StackingController;
 class StatusAreaWidget;
@@ skipping 191 matching lines @@
   }
 
   HighContrastController* high_contrast_controller() {
     return high_contrast_controller_.get();
   }
 
   internal::MagnificationController* magnification_controller() {
     return magnification_controller_.get();
   }
 
+  internal::PartialMagnificationController* partial_magnification_controller() {
+    return partial_magnification_controller_.get();
+  }
+
   Launcher* launcher() { return launcher_.get(); }
 
   const ScreenAsh* screen() { return screen_; }
 
   // Force the shelf to query for it's current visibility state.
   void UpdateShelfVisibility();
 
   // Sets/gets the shelf auto-hide behavior.
   void SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior);
   ShelfAutoHideBehavior GetShelfAutoHideBehavior() const;
@@ skipping 113 matching lines @@
   scoped_ptr<internal::VisibilityController> visibility_controller_;
   scoped_ptr<DesktopBackgroundController> desktop_background_controller_;
   scoped_ptr<PowerButtonController> power_button_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<internal::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_;
 
   // An event filter that rewrites or drops an event.
   scoped_ptr<internal::EventRewriterEventFilter> event_rewriter_filter_;
 
   // An event filter that pre-handles key events while the partial
   // screenshot UI or the keyboard overlay is active.
@@ skipping 38 matching lines @@
 
   // Used by ash/shell.
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_