Add missing using statements for JNI types.

mojo/android/javatests/validation_test_util.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 "mojo/android/javatests/validation_test_util.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/test/test_support_android.h"
 #include "jni/ValidationTestUtil_jni.h"
 #include "mojo/public/cpp/bindings/tests/validation_test_input_parser.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace mojo {
 namespace android {
 
 bool RegisterValidationTestUtil(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 ScopedJavaLocalRef<jobject> ParseData(
     JNIEnv* env,
     const JavaParamRef<jclass>& jcaller,
@@ skipping 15 matching lines @@
     DCHECK(!data.size());
     data_ptr = &data;
   }
   jobject byte_buffer =
       env->NewDirectByteBuffer(data_ptr, data.size());
   return Java_ValidationTestUtil_buildData(env, byte_buffer, num_handles, NULL);
 }
 
 }  // namespace android
 }  // namespace mojo