Add missing using statements for JNI types.

android_webview/native/aw_resource.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 "android_webview/common/aw_resource.h"
 
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "jni/AwResource_jni.h"
 
+using base::android::ScopedJavaLocalRef;
+
 namespace android_webview {
 namespace AwResource {
 
 std::vector<std::string> GetConfigKeySystemUuidMapping() {
   JNIEnv* env = base::android::AttachCurrentThread();
   std::vector<std::string> key_system_uuid_mappings;
   ScopedJavaLocalRef<jobjectArray> mappings =
       Java_AwResource_getConfigKeySystemUuidMapping(env);
   base::android::AppendJavaStringArrayToStringVector(env, mappings.obj(),
                                                      &key_system_uuid_mappings);
   return key_system_uuid_mappings;
 }
 
 }  // namespace AwResource
 }  // namespace android_webview