Replace scoped_ptr with unique_ptr in webrtc/modules/audio_device/

webrtc/modules/audio_device/android/build_info.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_
 #define WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_
 
 #include <jni.h>
+#include <memory>
 #include <string>
 
 #include "webrtc/modules/utility/include/jvm_android.h"
 
 namespace webrtc {
 
 // Utility class used to query the Java class (org/webrtc/voiceengine/BuildInfo)
 // for device and Android build information.
 // The calling thread is attached to the JVM at construction if needed and a
 // valid Java environment object is also created.
@@ skipping 23 matching lines @@
   // Helper method which calls a static getter method with |name| and returns
   // a string from Java.
   std::string GetStringFromJava(const char* name);
 
   // Ensures that this class can access a valid JNI interface pointer even
   // if the creating thread was not attached to the JVM.
   AttachCurrentThreadIfNeeded attach_thread_if_needed_;
 
   // Provides access to the JNIEnv interface pointer and the JavaToStdString()
   // method which is used to translate Java strings to std strings.
-  rtc::scoped_ptr<JNIEnvironment> j_environment_;
+  std::unique_ptr<JNIEnvironment> j_environment_;
 
   // Holds the jclass object and provides access to CallStaticObjectMethod().
   // Used by GetStringFromJava() during construction only.
   JavaClass j_build_info_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_BUILD_INFO_H_