WebSocketFrameChunk should use IOBuffer to hold data

net/websockets/websocket_frame.h

Index: net/websockets/websocket_frame.h
diff --git a/net/websockets/websocket_frame.h b/net/websockets/websocket_frame.h
index bce6fa22dbf4097f8e17b52ee9544749ab19f233..7ab6918d25327803a6e189c9ffcf9fe1410de7c1 100644
--- a/net/websockets/websocket_frame.h
+++ b/net/websockets/websocket_frame.h
@@ -8,11 +8,14 @@
 #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
@@ -74,7 +77,7 @@ struct NET_EXPORT_PRIVATE WebSocketFrameChunk {
   bool final_chunk;
 
   // |data| is always unmasked even if the frame is masked.
-  std::vector<char> data;
+  scoped_refptr<IOBufferWithSize> data;
 };
 
 // Contains four-byte data representing "masking key" of WebSocket frames.