Add missing using statements for JNI types.

media/midi/usb_midi_device_android.cc

 // Copyright 2014 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/midi/usb_midi_device_android.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_array.h"
 #include "base/i18n/icu_string_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "jni/UsbMidiDeviceAndroid_jni.h"
 #include "media/midi/usb_midi_descriptor_parser.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace media {
 namespace midi {
 
 UsbMidiDeviceAndroid::UsbMidiDeviceAndroid(
     const base::android::JavaRef<jobject>& raw_device,
     UsbMidiDeviceDelegate* delegate)
     : raw_device_(raw_device), delegate_(delegate) {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_UsbMidiDeviceAndroid_registerSelf(env, raw_device_.obj(),
                                          reinterpret_cast<jlong>(this));
@@ skipping 112 matching lines @@
   std::string encoded(reinterpret_cast<char*>(&descriptor[0]) + 2, size - 2);
   std::string result;
   // Unicode ECN specifies that the string is encoded in UTF-16LE.
   if (!base::ConvertToUtf8AndNormalize(encoded, "utf-16le", &result))
     return backup;
   return result;
 }
 
 }  // namespace midi
 }  // namespace media