Use standardized and extendable accelerometer update type.

ash/accelerometer/accelerometer_controller.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/accelerometer/accelerometer_controller.h"
 
 #include "ash/accelerometer/accelerometer_observer.h"
-#include "ui/gfx/geometry/vector3d_f.h"
 
 namespace ash {
 
 AccelerometerController::AccelerometerController() {
 }
 
 AccelerometerController::~AccelerometerController() {
 }
 
 void AccelerometerController::Initialize(
     scoped_refptr<base::TaskRunner> blocking_task_runner) {
 #if defined(OS_CHROMEOS)
   reader_.reset(new chromeos::AccelerometerReader(blocking_task_runner, this));
 #endif
 }
 
 void AccelerometerController::AddObserver(AccelerometerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void AccelerometerController::RemoveObserver(AccelerometerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 #if defined(OS_CHROMEOS)
-void AccelerometerController::HandleAccelerometerReading(
-    const gfx::Vector3dF& base,
-    const gfx::Vector3dF& lid) {
+void AccelerometerController::HandleAccelerometerUpdate(
+    const chromeos::AccelerometerUpdate& update) {
   FOR_EACH_OBSERVER(AccelerometerObserver, observers_,
-      OnAccelerometerUpdated(base, lid));
+      OnAccelerometerUpdated(update));
 }
 #endif
 
 }  // namespace ash