Add missing using statements for JNI types.

mojo/android/system/base_run_loop.cc

 // Copyright 2015 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/system/base_run_loop.h"
 
 #include <jni.h>
 
 #include "base/android/base_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "jni/BaseRunLoop_jni.h"
 #include "mojo/message_pump/message_pump_mojo.h"
 
+using base::android::JavaParamRef;
+
 namespace mojo {
 namespace android {
 
 static jlong CreateBaseRunLoop(JNIEnv* env,
                                const JavaParamRef<jobject>& jcaller) {
   base::MessageLoop* message_loop =
       new base::MessageLoop(common::MessagePumpMojo::Create());
   return reinterpret_cast<uintptr_t>(message_loop);
 }
 
@@ skipping 45 matching lines @@
 }
 
 bool RegisterBaseRunLoop(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace mojo