DeviceOrientation API on ChromeOS

ash/content/accelerometer/sensor_manager_delegate_chromeos.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_CONTENT_ACCELEROMETER_SENSOR_MANAGER_DELEGATE_CHROMEOS_H_
+#define ASH_CONTENT_ACCELEROMETER_SENSOR_MANAGER_DELEGATE_CHROMEOS_H_
+
+#include "content/public/browser/sensor_manager_delegate_chromeos.h"
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chromeos/accelerometer/accelerometer_reader.h"
+
+namespace ash {
+
+// Chrome OS implementation of the Device Orientation API. Responsible for
+// observing accelerometer events, and notifying content::SensorManagerChromeOS.
+class SensorManagerDelegateChromeOS
+    : public chromeos::AccelerometerReader::Observer,
+      public content::SensorManagerDelegateChromeOS {
+ public:
+  SensorManagerDelegateChromeOS();
+  ~SensorManagerDelegateChromeOS() override;
+
+  // AccelerometerReader::Observer:
+  void OnAccelerometerUpdated(const ui::AccelerometerUpdate& update) override;
+
+  // content::SensorManagerDelegateChromeOS:
+  void StartFetchingDeviceOrientationData(
+      const content::OrientationDataCallback& callback) override;
+  void StopFetchingDeviceOrientationData() override;
+
+ private:
+  // Callback to direct accelerometer events to.
+  content::OrientationDataCallback orientation_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(SensorManagerDelegateChromeOS);
+};
+
+}  // namespace ash
+
+#endif  // ASH_CONTENT_ACCELEROMETER_SENSOR_MANAGER_DELEGATE_CHROMEOS_H_