Make it possible to build cronet without icu.

components/cronet/android/cronet_jni.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 "base/android/base_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/at_exit.h"
-#include "base/i18n/icu_util.h"
 #include "components/cronet/android/org_chromium_net_UrlRequest.h"
 #include "components/cronet/android/org_chromium_net_UrlRequestContext.h"
 #include "net/android/net_jni_registrar.h"
 #include "url/android/url_jni_registrar.h"
 
+#if !defined(USE_ICU_ALTERNATIVES_ON_ANDROID)
+#include "base/i18n/icu_util.h"
+#endif
+
 namespace {
 
 const base::android::RegistrationMethod kCronetRegisteredMethods[] = {
   {"BaseAndroid", base::android::RegisterJni},
   {"NetAndroid", net::android::RegisterJni},
   {"UrlAndroid", url::android::RegisterJni},
   {"UrlRequest", cronet::UrlRequestRegisterJni},
   {"UrlRequestContext", cronet::UrlRequestContextRegisterJni},
 };
 
@@ skipping 10 matching lines @@
 
   base::android::InitVM(vm);
 
   if (!base::android::RegisterNativeMethods(
           env, kCronetRegisteredMethods, arraysize(kCronetRegisteredMethods))) {
     return -1;
   }
 
   g_at_exit_manager = new base::AtExitManager();
 
+#if !defined(USE_ICU_ALTERNATIVES_ON_ANDROID)
   base::i18n::InitializeICU();
+#endif
 
   return JNI_VERSION_1_6;
 }
 
 extern "C" void JNIEXPORT JNICALL JNI_OnUnLoad(JavaVM* jvm, void* reserved) {
   if (g_at_exit_manager) {
     delete g_at_exit_manager;
     g_at_exit_manager = NULL;
   }
 }