Coalesce small buffers in net::BidirectionalStream

net/quic/quic_chromium_client_stream.h

 // Copyright (c) 2012 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.
 //
 // NOTE: This code is not shared between Google and Chrome.
 
 #ifndef NET_QUIC_QUIC_RELIABLE_CLIENT_STREAM_H_
 #define NET_QUIC_QUIC_RELIABLE_CLIENT_STREAM_H_
 
 #include <stddef.h>
+#include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_request_info.h"
 #include "net/http/http_response_info.h"
 #include "net/http/http_stream.h"
 #include "net/quic/quic_spdy_stream.h"
 
@@ skipping 51 matching lines @@
                       QuicAckListenerInterface* ack_notifier_delegate) override;
   SpdyPriority priority() const override;
 
   // While the server's set_priority shouldn't be called externally, the creator
   // of client-side streams should be able to set the priority.
   using QuicSpdyStream::SetPriority;
 
   int WriteStreamData(base::StringPiece data,
                       bool fin,
                       const CompletionCallback& callback);
+  // Same as WriteStreamData except it writes data from a vector of IOBuffers,
+  // with the length of each buffer at the corresponding index in |lengths|.
+  int WritevStreamData(const std::vector<IOBuffer*>& buffers,
+                       const std::vector<int>& lengths,
+                       bool fin,
+                       const CompletionCallback& callback);

[Ryan Hamilton, 2016/04/26 16:52:16]

Can you add a test for this method?

   // Set new |delegate|. |delegate| must not be NULL.
   // If this stream has already received data, OnDataReceived() will be
   // called on the delegate.
   void SetDelegate(Delegate* delegate);
   Delegate* GetDelegate() { return delegate_; }
   void OnError(int error);
 
   // Reads at most |buf_len| bytes into |buf|. Returns the number of bytes read.
   int Read(IOBuffer* buf, int buf_len);
 
@@ skipping 38 matching lines @@
   std::deque<base::Closure> delegate_tasks_;
 
   base::WeakPtrFactory<QuicChromiumClientStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicChromiumClientStream);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_RELIABLE_CLIENT_STREAM_H_