Implement DeviceMotionEvent API

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/shell.h"
@@ skipping 129 matching lines @@
   if (locking_windows_.find(window) == locking_windows_.end())
     return;
   ApplyLockForActiveWindow();
 }
 
 void ScreenOrientationController::OnWindowDestroying(aura::Window* window) {
   RemoveLockingWindow(window);
 }
 
 void ScreenOrientationController::OnAccelerometerUpdated(
-    const chromeos::AccelerometerUpdate& update) {
+    scoped_refptr<const chromeos::AccelerometerUpdate> update) {
   if (rotation_locked_ && !CanRotateInLockedState())
     return;
-  if (!update.has(chromeos::ACCELEROMETER_SOURCE_SCREEN))
+  if (!update->has(chromeos::ACCELEROMETER_SOURCE_SCREEN))
     return;
   // Ignore the reading if it appears unstable. The reading is considered
   // unstable if it deviates too much from gravity
-  if (ui::IsAccelerometerReadingStable(update,
+  if (ui::IsAccelerometerReadingStable(*update,
                                        chromeos::ACCELEROMETER_SOURCE_SCREEN)) {
-    HandleScreenRotation(update.get(chromeos::ACCELEROMETER_SOURCE_SCREEN));
+    HandleScreenRotation(update->get(chromeos::ACCELEROMETER_SOURCE_SCREEN));
   }
 }
 
 bool ScreenOrientationController::FullScreenRequired(
     content::WebContents* web_contents) {
   return true;
 }
 
 void ScreenOrientationController::Lock(
     content::WebContents* web_contents,
@@ skipping 243 matching lines @@
 }
 
 bool ScreenOrientationController::CanRotateInLockedState() {
   return rotation_locked_orientation_ ==
              blink::WebScreenOrientationLockLandscape ||
          rotation_locked_orientation_ ==
              blink::WebScreenOrientationLockPortrait;
 }
 
 }  // namespace ash