Additions to the Android java-side Device Motion/Orientation fetching

content/browser/device_orientation/data_fetcher_impl_android.cc

 // Copyright (c) 2012 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 "content/browser/device_orientation/data_fetcher_impl_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 #include "content/browser/device_orientation/orientation.h"
 #include "jni/DeviceMotionAndOrientation_jni.h"
@@ skipping 93 matching lines @@
       rate_in_milliseconds);
 }
 
 void DataFetcherImplAndroid::Stop(DeviceData::Type event_type) {
   DCHECK(!device_orientation_.is_null());
   Java_DeviceMotionAndOrientation_stop(
       AttachCurrentThread(), device_orientation_.obj(),
       static_cast<jint>(event_type));
 }
 
+int DataFetcherImplAndroid::GetNumberActiveDeviceMotionSensors() {
+  DCHECK(!device_orientation_.is_null());
+  return Java_DeviceMotionAndOrientation_getNumberActiveDeviceMotionSensors(
+      AttachCurrentThread(), device_orientation_.obj());
+}
+
 }  // namespace content