Make it possible to build url/ without ICU on android.

url/android/url_jni_registrar.cc

Index: url/android/url_jni_registrar.cc
diff --git a/url/android/url_jni_registrar.cc b/url/android/url_jni_registrar.cc
new file mode 100644
index 0000000000000000000000000000000000000000..82a6e1b76bd699624c8b7296382668c4cc46abaa
--- /dev/null
+++ b/url/android/url_jni_registrar.cc
@@ -0,0 +1,24 @@
+// 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 "url/android/url_jni_registrar.h"
+
+#ifdef USE_ICU_ALTERNATIVES_ON_ANDROID
+#include "url/url_canon_icu_alternatives_android.h"
+#endif
+
+namespace url {
+namespace android {
+
+bool RegisterJni(JNIEnv* env) {
+#ifdef USE_ICU_ALTERNATIVES_ON_ANDROID
+  return RegisterIcuAlternativesJni(env);
+#endif
+
+  // Do nothing if USE_ICU_ALTERNATIVES_ON_ANDROID is not defined.
+  return true;
+}
+
+}  // namespace android
+}  // namespace url