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

content/browser/device_sensors/sensor_manager_android.h

Index: content/browser/device_sensors/sensor_manager_android.h
diff --git a/content/browser/device_sensors/sensor_manager_android.h b/content/browser/device_sensors/sensor_manager_android.h
index b8e90d86434fdd2e62205a35bb3c8e2c8f6633c8..714b8ec04165bdad26d3301a5d1137458229c788 100644
--- a/content/browser/device_sensors/sensor_manager_android.h
+++ b/content/browser/device_sensors/sensor_manager_android.h
@@ -86,6 +86,7 @@ class CONTENT_EXPORT SensorManagerAndroid {
   void ClearInternalMotionBuffers();
 
   void SetOrientationBufferReadyStatus(bool ready);
+  bool isUsingBackupSensorsForOrientation();
 
   // The Java provider of sensors info.
   base::android::ScopedJavaGlobalRef<jobject> device_sensors_;
@@ -102,6 +103,8 @@ class CONTENT_EXPORT SensorManagerAndroid {
   base::Lock motion_buffer_lock_;
   base::Lock orientation_buffer_lock_;
 
+  bool is_using_backup_sensors_for_orientation_;
+
   DISALLOW_COPY_AND_ASSIGN(SensorManagerAndroid);
 };