Add missing using declarations in cronet code.

components/cronet/android/cronet_library_loader.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 "components/cronet/android/cronet_library_loader.h"
 
 #include <jni.h>
 #include <vector>
 
 #include "base/android/base_jni_onload.h"
@@ skipping 18 matching lines @@
 #include "net/android/net_jni_registrar.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
 #include "url/url_features.h"
 #include "url/url_util.h"
 
 #if !BUILDFLAG(USE_PLATFORM_ICU_ALTERNATIVES)
 #include "base/i18n/icu_util.h"  // nogncheck
 #endif
 
+using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
+
 namespace cronet {
 namespace {
 
 const base::android::RegistrationMethod kCronetRegisteredMethods[] = {
     {"BaseAndroid", base::android::RegisterJni},
     {"ChromiumUrlRequest", ChromiumUrlRequestRegisterJni},
     {"ChromiumUrlRequestContext", ChromiumUrlRequestContextRegisterJni},
     {"CronetBidirectionalStreamAdapter",
      CronetBidirectionalStreamAdapter::RegisterJni},
     {"CronetLibraryLoader", RegisterNativesImpl},
@@ skipping 58 matching lines @@
   g_network_change_notifier = net::NetworkChangeNotifier::Create();
 }
 
 ScopedJavaLocalRef<jstring> GetCronetVersion(
     JNIEnv* env,
     const JavaParamRef<jclass>& jcaller) {
   return base::android::ConvertUTF8ToJavaString(env, CRONET_VERSION);
 }
 
 }  // namespace cronet