Add missing using statements for JNI types.

media/capture/content/android/screen_capture_machine_android.cc

 // Copyright 2016 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 "media/capture/content/android/screen_capture_machine_android.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "jni/ScreenCapture_jni.h"
 #include "media/capture/content/video_capture_oracle.h"
 #include "third_party/libyuv/include/libyuv.h"
 
 using base::android::AttachCurrentThread;
+using base::android::ScopedJavaLocalRef;
 
 namespace media {
 
 // static
 bool ScreenCaptureMachineAndroid::RegisterScreenCaptureMachine(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 ScreenCaptureMachineAndroid::ScreenCaptureMachineAndroid() {}
 
@@ skipping 241 matching lines @@
       frame->visible_data(VideoFrame::kUPlane),
       frame->stride(VideoFrame::kUPlane),
       frame->visible_data(VideoFrame::kVPlane),
       frame->stride(VideoFrame::kVPlane), frame->visible_rect().width(),
       frame->visible_rect().height(), libyuv::kFilterBilinear);
 
   capture_frame_cb.Run(frame, start_time, true);
 }
 
 }  // namespace media