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

url/url_canon_icu_alternatives_android.h

Index: url/url_canon_icu_alternatives_android.h
diff --git a/url/url_canon_icu_alternatives_android.h b/url/url_canon_icu_alternatives_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a13d4894bbc56905ed208511407597fffa5cf0b
--- /dev/null
+++ b/url/url_canon_icu_alternatives_android.h
@@ -0,0 +1,12 @@
+// 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 <jni.h>
+
+namespace url {
+
+// Explicitly register static JNI functions needed when not using ICU.
+bool RegisterIcuAlternativesJni(JNIEnv* env);
+
+}  // namespace url