make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

net/socket/tcp_client_socket.h

Index: net/socket/tcp_client_socket.h
diff --git a/net/socket/tcp_client_socket.h b/net/socket/tcp_client_socket.h
index fabcbc1b39d6e1647a680b0655aa46a8127ac20e..970da2a026ff87799fe4a70dc7dba4044e00ba07 100644
--- a/net/socket/tcp_client_socket.h
+++ b/net/socket/tcp_client_socket.h
@@ -60,8 +60,8 @@ class NET_EXPORT TCPClientSocket : public StreamSocket {
                    const CompletionCallback& 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 SetReceiveBufferSize(int32 size) OVERRIDE;
+  virtual int SetSendBufferSize(int32 size) OVERRIDE;
 
   virtual bool SetKeepAlive(bool enable, int delay);
   virtual bool SetNoDelay(bool no_delay);