Implemented screen rotation animation experiment.

ash/content/display/screen_orientation_controller_chromeos.cc

 // Copyright 2014 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/content/display/screen_orientation_controller_chromeos.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_manager.h"
+#include "ash/rotator/screen_rotation_animator.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "chromeos/accelerometer/accelerometer_reader.h"
 #include "chromeos/accelerometer/accelerometer_types.h"
 #include "content/public/browser/screen_orientation_provider.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
@@ skipping 91 matching lines @@
 }
 
 void ScreenOrientationController::SetDisplayRotation(
     gfx::Display::Rotation rotation) {
   DisplayManager* display_manager = Shell::GetInstance()->display_manager();
   if (!display_manager->HasInternalDisplay())
     return;
   current_rotation_ = rotation;
   base::AutoReset<bool> auto_ignore_display_configuration_updates(
       &ignore_display_configuration_updates_, true);
-  display_manager->SetDisplayRotation(gfx::Display::InternalDisplayId(),
-                                      rotation);
+  ash::ScreenRotationAnimator(gfx::Display::InternalDisplayId())
+      .Rotate(rotation);
 }
 
 void ScreenOrientationController::OnWindowActivated(aura::Window* gained_active,
                                                     aura::Window* lost_active) {
   ApplyLockForActiveWindow();
 }
 
 // Currently contents::WebContents will only be able to lock rotation while
 // fullscreen. In this state a user cannot click on the tab strip to change. If
 // this becomes supported for non-fullscreen tabs then the following interferes
@@ skipping 280 matching lines @@
 }
 
 bool ScreenOrientationController::CanRotateInLockedState() {
   return rotation_locked_orientation_ ==
              blink::WebScreenOrientationLockLandscape ||
          rotation_locked_orientation_ ==
              blink::WebScreenOrientationLockPortrait;
 }
 
 }  // namespace ash