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

net/socket/tcp_client_socket.h

 // Copyright (c) 2011 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_SOCKET_TCP_CLIENT_SOCKET_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 42 matching lines @@
   virtual NextProto GetNegotiatedProtocol() const OVERRIDE;
   virtual bool GetSSLInfo(SSLInfo* ssl_info) OVERRIDE;
 
   // Socket implementation.
   // Multiple outstanding requests are not supported.
   // Full duplex mode (reading and writing at the same time) is supported.
   virtual int Read(IOBuffer* buf, int buf_len,
                    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);
 
  private:
   // State machine for connecting the socket.
   enum ConnectState {
     CONNECT_STATE_CONNECT,
     CONNECT_STATE_CONNECT_COMPLETE,
     CONNECT_STATE_NONE,
@@ skipping 37 matching lines @@
   // Record of connectivity and transmissions, for use in speculative connection
   // histograms.
   UseHistory use_history_;
 
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_H_