Add missing using declarations in cronet code.

components/cronet/android/test/cronet_test_util.cc

 // Copyright 2016 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 "components/cronet/android/test/cronet_test_util.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "components/cronet/android/cronet_url_request_adapter.h"
 #include "components/cronet/android/cronet_url_request_context_adapter.h"
 #include "components/cronet/android/test/native_test_server.h"
 #include "components/cronet/android/url_request_context_adapter.h"
 #include "jni/CronetTestUtil_jni.h"
 #include "net/dns/host_resolver_impl.h"
 #include "net/dns/mock_host_resolver.h"
 #include "net/url_request/url_request.h"
 
+using base::android::JavaParamRef;
+
 namespace cronet {
 
 const char kFakeSdchDomain[] = "fake.sdch.domain";
 // This must match the certificate used
 // (quic_test.example.com.crt and quic_test.example.com.key.pkcs8), and
 // the file served (
 // components/cronet/android/test/assets/test/quic_data/simple.txt).
 const char kFakeQuicDomain[] = "test.example.com";
 
 namespace {
@@ skipping 59 matching lines @@
   return reinterpret_cast<CronetURLRequestAdapter*>(urlRequest)
       ->GetURLRequestForTesting()
       ->load_flags();
 }
 
 bool RegisterCronetTestUtil(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace cronet