Implement Drain() on HttpPipelinedStream.

net/http/http_response_headers.cc

 // Copyright (c) 2011 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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
@@ skipping 1273 matching lines @@
 
   // We have all the values; let's verify that they make sense for a 206
   // response.
   if (*first_byte_position < 0 || *last_byte_position < 0 ||
       *instance_length < 0 || *instance_length - 1 < *last_byte_position)
     return false;
 
   return true;
 }
 
+bool HttpResponseHeaders::IsChunkEncoded() const {
+  // Ignore spurious chunked responses from HTTP/1.0 servers and proxies.
+  return GetHttpVersion() >= HttpVersion(1, 1) &&
+      HasHeaderValue("Transfer-Encoding", "chunked");
+}
+
 }  // namespace net