Make it possible to build cronet without icu.

net/android/net_jni_registrar.cc

 // Copyright (c) 2012 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 "net/android/net_jni_registrar.h"
 
 #include "base/basictypes.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "net/android/android_private_key.h"
 #include "net/android/gurl_utils.h"
 #include "net/android/keystore.h"
 #include "net/android/network_change_notifier_android.h"
 #include "net/android/network_library.h"
 #include "net/cert/x509_util_android.h"
 #include "net/proxy/proxy_config_service_android.h"
 
-#if defined(USE_ICU_ALTERNATIVES)
+#if defined(USE_ICU_ALTERNATIVES_ON_ANDROID)
 #include "net/base/net_string_util_icu_alternatives_android.h"
 #endif
 
 namespace net {
 namespace android {
 
 static base::android::RegistrationMethod kNetRegisteredMethods[] = {
   { "AndroidCertVerifyResult", net::android::RegisterCertVerifyResult },
   { "AndroidPrivateKey", net::android::RegisterAndroidPrivateKey},
   { "AndroidKeyStore", net::android::RegisterKeyStore },
   { "AndroidNetworkLibrary", net::android::RegisterNetworkLibrary },
   { "GURLUtils", net::RegisterGURLUtils },
   { "NetworkChangeNotifierAndroid",
     net::NetworkChangeNotifierAndroid::Register },
   { "ProxyConfigService", net::ProxyConfigServiceAndroid::Register },
   { "X509Util", net::RegisterX509Util },
-#if defined(USE_ICU_ALTERNATIVES)
+#if defined(USE_ICU_ALTERNATIVES_ON_ANDROID)
   { "NetStringUtils", net::RegisterNetStringUtils }
 #endif
 };
 
 bool RegisterJni(JNIEnv* env) {
   return base::android::RegisterNativeMethods(
       env, kNetRegisteredMethods, arraysize(kNetRegisteredMethods));
 }
 
 }  // namespace android
 }  // namespace net