Add missing using declarations in cronet code.

components/cronet/android/test/mock_url_request_job_factory.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 "mock_url_request_job_factory.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "jni/MockUrlRequestJobFactory_jni.h"
 #include "net/test/url_request/ssl_certificate_error_job.h"
 #include "net/test/url_request/url_request_failed_job.h"
 #include "net/test/url_request/url_request_hanging_read_job.h"
 #include "net/test/url_request/url_request_mock_data_job.h"
 #include "url/gurl.h"
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace cronet {
 
 void AddUrlInterceptors(JNIEnv* env, const JavaParamRef<jclass>& jcaller) {
   net::URLRequestMockDataJob::AddUrlHandler();
   net::URLRequestFailedJob::AddUrlHandler();
   net::URLRequestHangingReadJob::AddUrlHandler();
   net::SSLCertificateErrorJob::AddUrlHandler();
 }
 
 ScopedJavaLocalRef<jstring> GetMockUrlWithFailure(
@@ skipping 37 matching lines @@
     const JavaParamRef<jclass>& jcaller) {
   GURL url(net::URLRequestHangingReadJob::GetMockHttpUrl());
   return base::android::ConvertUTF8ToJavaString(jenv, url.spec());
 }
 
 bool RegisterMockUrlRequestJobFactory(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace cronet