WebSocketFrameChunk should use IOBuffer to hold data

net/websockets/websocket_frame.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.
 
 #ifndef NET_WEBSOCKETS_WEBSOCKET_FRAME_H_
 #define NET_WEBSOCKETS_WEBSOCKET_FRAME_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/net_export.h"
 
 namespace net {
 
+class IOBufferWithSize;
+
 // Represents a WebSocket frame header.
 //
 // Members of this class correspond to each element in WebSocket frame header
 // (see http://tools.ietf.org/html/rfc6455#section-5.2).
 struct NET_EXPORT_PRIVATE WebSocketFrameHeader {
   typedef int OpCode;
   static const OpCode kOpCodeContinuation;
   static const OpCode kOpCodeText;
   static const OpCode kOpCodeBinary;
   static const OpCode kOpCodeClose;
@@ skipping 40 matching lines @@
   WebSocketFrameChunk();
   ~WebSocketFrameChunk();
 
   // Non-null |header| is provided only if this chunk is the first part of
   // a series of chunks.
   scoped_ptr<WebSocketFrameHeader> header;
 
   // Indicates this part is the last chunk of a frame.
   bool final_chunk;
 
-  // |data| is always unmasked even if the frame is masked.
-  std::vector<char> data;
+  // |data| is always unmasked even if the frame is masked. |data| might be
+  // null in the first chunk.
+  scoped_refptr<IOBufferWithSize> data;
 };
 
 // Contains four-byte data representing "masking key" of WebSocket frames.
 struct WebSocketMaskingKey {
   char key[WebSocketFrameHeader::kMaskingKeyLength];
 };
 
 // Writes wire format of a WebSocket frame header into |output|, and returns
 // the number of bytes written.
 //
@@ skipping 33 matching lines @@
 // used for unmasking a WebSocket frame.
 NET_EXPORT_PRIVATE void MaskWebSocketFramePayload(
     const WebSocketMaskingKey& masking_key,
     uint64 frame_offset,
     char* data,
     int data_size);
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_FRAME_H_