Use standardized and extendable accelerometer update type.

ash/accelerometer/accelerometer_controller.h

 // 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.
 
 #ifndef ASH_ACCELEROMETER_ACCELEROMETER_CONTROLLER_H_
 #define ASH_ACCELEROMETER_ACCELEROMETER_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/accelerometer/accelerometer_reader.h"
 #endif
 
 namespace base {
 class TaskRunner;
 }
 
-namespace gfx {
-class Vector3dF;
-}
-
 namespace ash {
 
 class AccelerometerObserver;
 
 // This class owns the communication interface for talking to the accelerometer
 // on supporting devices. Observers will be delivered OnAccelerometerRead
 // notifications if an accelerometer was detected.
 class ASH_EXPORT AccelerometerController
 #if defined(OS_CHROMEOS)
     : public chromeos::AccelerometerReader::Delegate {
 #else
     {
 #endif
  public:
   AccelerometerController();
   virtual ~AccelerometerController();
 
   // Initialize the accelerometer reader.
   void Initialize(scoped_refptr<base::TaskRunner> blocking_task_runner);
 
   // Add/remove observer.
   void AddObserver(AccelerometerObserver* observer);
   void RemoveObserver(AccelerometerObserver* observer);
 
 #if defined(OS_CHROMEOS)
   // This needs to be CHROMEOS only as on other platforms it does not actually
   // override a method.
   // chromeos::AccelerometerReader::Delegate:
-  virtual void HandleAccelerometerReading(const gfx::Vector3dF& base,
-                                          const gfx::Vector3dF& lid) OVERRIDE;
+  virtual void HandleAccelerometerUpdate(
+      const ui::AccelerometerUpdate& update) OVERRIDE;
 #endif
 
  private:
 #if defined(OS_CHROMEOS)
   // The AccelerometerReader which directly triggers and reads from the
   // accelerometer device.
   scoped_ptr<chromeos::AccelerometerReader> reader_;
 #endif
 
   ObserverList<AccelerometerObserver, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AccelerometerController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_ACCELEROMETER_ACCELEROMETER_CONTROLLER_H_