Add missing using statements for JNI types.

chrome/browser/android/net/external_estimate_provider_android.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 "chrome/browser/android/net/external_estimate_provider_android.h"
 
 #include <stdint.h>
 
 #include "base/android/context_utils.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "content/public/browser/browser_thread.h"
 #include "jni/ExternalEstimateProviderAndroid_jni.h"
 
+using base::android::JavaParamRef;
+
 namespace chrome {
 namespace android {
 
 ExternalEstimateProviderAndroid::ExternalEstimateProviderAndroid()
     : task_runner_(nullptr),
       delegate_(nullptr),
       weak_factory_(this) {
   if (base::ThreadTaskRunnerHandle::IsSet())
     task_runner_ = base::ThreadTaskRunnerHandle::Get();
   JNIEnv* env = base::android::AttachCurrentThread();
@@ skipping 118 matching lines @@
                                           upstream_throughput_kbps);
   }
 }
 
 bool RegisterExternalEstimateProviderAndroid(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace android
 }  // namespace chrome