base::Bind: Convert Socket::Write.

net/spdy/spdy_proxy_client_socket.h

Index: net/spdy/spdy_proxy_client_socket.h
diff --git a/net/spdy/spdy_proxy_client_socket.h b/net/spdy/spdy_proxy_client_socket.h
index fb2d9a33f6b9bc7e29bf91c44363c033c6628107..9fb97e88de73428d98c1e6b0ef89c0595946582c 100644
--- a/net/spdy/spdy_proxy_client_socket.h
+++ b/net/spdy/spdy_proxy_client_socket.h
@@ -84,6 +84,9 @@ class NET_EXPORT_PRIVATE SpdyProxyClientSocket : public ProxyClientSocket,
   virtual int Write(IOBuffer* buf,
                     int buf_len,
                     OldCompletionCallback* callback) OVERRIDE;
+  virtual int Write(IOBuffer* buf,
+                    int buf_len,
+                    const CompletionCallback& callback) OVERRIDE;
   virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
   virtual bool SetSendBufferSize(int32 size) OVERRIDE;
   virtual int GetPeerAddress(AddressList* address) const OVERRIDE;
@@ -137,7 +140,8 @@ class NET_EXPORT_PRIVATE SpdyProxyClientSocket : public ProxyClientSocket,
   OldCompletionCallback* old_read_callback_;
   CompletionCallback read_callback_;
   // Stores the callback to the layer above, called on completing Write().
-  OldCompletionCallback* write_callback_;
+  OldCompletionCallback* old_write_callback_;
+  CompletionCallback write_callback_;
 
   // CONNECT request and response.
   HttpRequestInfo request_;