Cronet Java wrappers to fallback to HttpUrlConnection if Cronet is not available.

net/cronet/android/java/src/org/chromium/net/HttpUrlRequestListener.java

Index: net/cronet/android/java/src/org/chromium/net/HttpUrlRequestListener.java
diff --git a/net/cronet/android/java/src/org/chromium/net/HttpUrlRequestListener.java b/net/cronet/android/java/src/org/chromium/net/HttpUrlRequestListener.java
new file mode 100644
index 0000000000000000000000000000000000000000..00b9c9392055bde112bf87ea819f2914e568063e
--- /dev/null
+++ b/net/cronet/android/java/src/org/chromium/net/HttpUrlRequestListener.java
@@ -0,0 +1,17 @@
+// 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.
+
+package org.chromium.net;
+
+/**
+ * Callback interface.
+ */
+public interface HttpUrlRequestListener {
+    /**
+     * The listener should completely process the response in the callback
+     * method. Immediately after the callback, the request object will be
+     * recycled.
+     */
+    void onRequestComplete(HttpUrlRequest request);
+}