Slow start pipelining.

net/http/http_pipelined_connection_impl.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_PIPELINED_CONNECTION_IMPL_H_
 #define NET_HTTP_HTTP_PIPELINED_CONNECTION_IMPL_H_
 #pragma once
 
 #include <map>
 #include <queue>
@@ skipping 233 matching lines @@
   // Cleans up the state associated with the active request. Invokes
   // DoReadNextHeaders() in a new task to start the next response. This is
   // called after the active request's HttpPipelinedSocket calls Close().
   int DoReadStreamClosed();
 
   // Removes all pending ReadResponseHeaders() requests from the queue. This may
   // happen if there is an error with the pipeline or one of our
   // HttpPipelinedSockets indicates the connection was suddenly closed.
   int DoEvictPendingReadHeaders(int result);
 
+  // Reports back to |delegate_| whether pipelining will work. This is called
+  // every time we receive headers.
+  void CheckHeadersForPipelineCompatibility(int result, int pipeline_id);
+
   // Posts a task to fire the user's callback in response to SendRequest() or
   // ReadResponseHeaders() completing on an underlying parser. This might be
   // invoked in response to our own IO callbacks, or it may be invoked if the
   // underlying parser completes SendRequest() or ReadResponseHeaders()
   // synchronously, but we've already returned ERR_IO_PENDING to the user's
   // SendRequest() or ReadResponseHeaders() call into us.
   void QueueUserCallback(int pipeline_id,
                          OldCompletionCallback* callback,
                          int rv,
                          const tracked_objects::Location& from_here);
@@ skipping 28 matching lines @@
   int active_read_id_;
   bool read_still_on_call_stack_;
   OldCompletionCallbackImpl<HttpPipelinedConnectionImpl> read_io_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpPipelinedConnectionImpl);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PIPELINED_CONNECTION_IMPL_H_