Android: add support for Device Orientation on devices where ROTATION_VECTOR is not availabl…

content/browser/device_sensors/sensor_manager_android.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 CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_
 #define CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
@@ skipping 68 matching lines @@
     RECEIVED_MOTION_DATA_MAX = 3,
   };
 
   void SetLightBufferValue(double lux);
 
   void CheckMotionBufferReadyToRead();
   void SetMotionBufferReadyStatus(bool ready);
   void ClearInternalMotionBuffers();
 
   void SetOrientationBufferReadyStatus(bool ready);
+  bool isUsingBackupSensorsForOrientation();
 
   // The Java provider of sensors info.
   base::android::ScopedJavaGlobalRef<jobject> device_sensors_;
   int number_active_device_motion_sensors_;
   int received_motion_data_[RECEIVED_MOTION_DATA_MAX];
   DeviceLightHardwareBuffer* device_light_buffer_;
   DeviceMotionHardwareBuffer* device_motion_buffer_;
   DeviceOrientationHardwareBuffer* device_orientation_buffer_;
   bool is_light_buffer_ready_;
   bool is_motion_buffer_ready_;
   bool is_orientation_buffer_ready_;
 
   base::Lock light_buffer_lock_;
   base::Lock motion_buffer_lock_;
   base::Lock orientation_buffer_lock_;
 
+  bool is_using_backup_sensors_for_orientation_;
+
   DISALLOW_COPY_AND_ASSIGN(SensorManagerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVICE_SENSORS_SENSOR_MANAGER_ANDROID_H_