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

net/spdy/spdy_proxy_client_socket.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_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_
 #define NET_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_
 
 #include <list>
 #include <string>
 
@@ skipping 68 matching lines @@
   virtual NextProto GetNegotiatedProtocol() const OVERRIDE;
   virtual bool GetSSLInfo(SSLInfo* ssl_info) OVERRIDE;
 
   // Socket implementation.
   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 int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
   virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
 
   // SpdyStream::Delegate implementation.
   virtual void OnRequestHeadersSent() OVERRIDE;
   virtual SpdyResponseHeadersStatus OnResponseHeadersUpdated(
       const SpdyHeaderBlock& response_headers) OVERRIDE;
   virtual void OnDataReceived(scoped_ptr<SpdyBuffer> buffer) OVERRIDE;
   virtual void OnDataSent() OVERRIDE;
   virtual void OnClose(int status) OVERRIDE;
@@ skipping 65 matching lines @@
   base::WeakPtrFactory<SpdyProxyClientSocket> weak_factory_;
 
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdyProxyClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_PROXY_CLIENT_SOCKET_H_