Add the partial screen magnifier to Chrome OS.

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 "ash/accelerators/focus_manager_factory.h"
 #include "ash/ash_switches.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/display/display_controller.h"
 #include "ash/display/mouse_cursor_event_filter.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/screen_position_controller.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/focus_cycler.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/magnifier/magnification_controller.h"
+#include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_factory.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/tooltips/tooltip_controller.h"
 #include "ash/touch/touch_observer_hud.h"
@@ skipping 231 matching lines @@
   system_tray_notifier_.reset();
 
   // Destroy all child windows including widgets.
   display_controller_->CloseChildWindows();
 
   // These need a valid Shell instance to clean up properly, so explicitly
   // delete them before invalidating the instance.
   // Alphabetical.
   drag_drop_controller_.reset();
   magnification_controller_.reset();
+  partial_magnification_controller_.reset();
   power_button_controller_.reset();
   session_state_controller_.reset();
   resize_shadow_controller_.reset();
   shadow_controller_.reset();
   tooltip_controller_.reset();
   event_client_.reset();
   window_cycle_controller_.reset();
   capture_controller_.reset();
   nested_dispatcher_controller_.reset();
   user_action_client_.reset();
@@ skipping 186 matching lines @@
   stacking_client_.reset(delegate_->CreateStackingClient());
   if (stacking_client_.get())
     aura::client::SetStackingClient(stacking_client_.get());
   visibility_controller_.reset(new internal::VisibilityController);
   drag_drop_controller_.reset(new internal::DragDropController);
   user_action_client_.reset(delegate_->CreateUserActionClient());
   window_modality_controller_.reset(new internal::WindowModalityController);
   AddPreTargetHandler(window_modality_controller_.get());
 
   magnification_controller_.reset(
-      internal::MagnificationController::CreateInstance());
+      MagnificationController::CreateInstance());
+
+  partial_magnification_controller_.reset(
+      new PartialMagnificationController());
 
   high_contrast_controller_.reset(new HighContrastController);
   video_detector_.reset(new VideoDetector);
   window_cycle_controller_.reset(
       new WindowCycleController(activation_controller_.get()));
 
   tooltip_controller_.reset(new internal::TooltipController(
       drag_drop_controller_.get()));
   AddPreTargetHandler(tooltip_controller_.get());
 
@@ skipping 356 matching lines @@
 
 bool Shell::CanAcceptEvents() {
   return true;
 }
 
 ui::EventTarget* Shell::GetParentTarget() {
   return NULL;
 }
 
 }  // namespace ash