Initial declaration of Cronet Async API.

components/cronet/android/java/src/org/chromium/net/ResponseInfo.java

+// 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;
+
+import java.net.URL;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * I’m sure I’ve left out a lot of things we may want here,
+ * this list is not intended to be complete, though comments are welcome.
+ */
+public abstract interface ResponseInfo {
+    /**
+     * Return the url the response is for (Not the original URL - after
+     * redirects, it’s the new URL).
+     */
+    URL getUrl();
+
+    /**
+     *
+     * @return the url chain, including all redirects.  The originally
+     * requested URL is first.
+     */
+    URL[] getUrlChain();
+
+    /**
+     * Returns the HTTP status code.
+     */
+    int getHttpStatusCode();
+
+    /**
+     * Returns an unmodifiable map of the response-header fields and values.
+     * The null key is mapped to the HTTP status line for compatibility with
+     * HttpUrlConnection.
+     */
+    Map<String, List<String>> getAllHeaders();
+
+    /** True if the response came from the cache.  Requests that were
+    * revalidated over the network before being retrieved from the cache are
+    * considered cached.
+    */
+    boolean wasCached();
+
+    /**
+     *
+     * @return
+     */
+    boolean wasFetchedOverSPDY();
+
+    /**
+     *
+     * @return
+     */
+    boolean wasFetchedOverQUIC();
+};