Pass JavaRef to Java methods in device/bluetooth.

device/bluetooth/bluetooth_device_android.h

 // Copyright 2015 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 DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_ANDROID_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_ANDROID_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "device/bluetooth/bluetooth_adapter_android.h"
 #include "device/bluetooth/bluetooth_device.h"
 
 namespace device {
 
 // BluetoothDeviceAndroid along with its owned Java class
 // org.chromium.device.bluetooth.ChromeBluetoothDevice implement
 // BluetoothDevice.
 class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceAndroid final
     : public BluetoothDevice {
  public:
   // Create a BluetoothDeviceAndroid instance and associated Java
   // ChromeBluetoothDevice using the provided |java_bluetooth_device_wrapper|.
   //
   // The ChromeBluetoothDevice instance will hold a Java reference
   // to |bluetooth_device_wrapper|.
   //
   // TODO(scheib): Return a std::unique_ptr<>, but then adapter will need to
   // handle
   // this correctly. http://crbug.com/506416
   static BluetoothDeviceAndroid* Create(
       BluetoothAdapterAndroid* adapter,
-      jobject bluetooth_device_wrapper);  // Java Type: bluetoothDeviceWrapper
+      const base::android::JavaRef<jobject>&
+          bluetooth_device_wrapper);  // Java Type: bluetoothDeviceWrapper
 
   ~BluetoothDeviceAndroid() override;
 
   // Register C++ methods exposed to Java using JNI.
   static bool RegisterJNI(JNIEnv* env);
 
   // Returns the associated ChromeBluetoothDevice Java object.
   base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
 
   // Get owning BluetoothAdapter cast to BluetoothAdapterAndroid.
@@ skipping 74 matching lines @@
   base::android::ScopedJavaGlobalRef<jobject> j_device_;
 
   bool gatt_connected_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothDeviceAndroid);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_DEVICE_ANDROID_H_