[Net] Fix error handling on wrong file in UploadData

chrome_frame/urlmon_upload_data_stream.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 CHROME_FRAME_URLMON_UPLOAD_DATA_STREAM_H_
 #define CHROME_FRAME_URLMON_UPLOAD_DATA_STREAM_H_
 
 #include <urlmon.h>
 #include <atlbase.h>
 #include <atlcom.h>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome_frame/stream_impl.h"
 #include "net/base/upload_data.h"
 #include "net/base/upload_data_stream.h"
 
 // Provides an IStream interface to the very different UploadDataStream
 // implementation.
 class UrlmonUploadDataStream : public CComObjectRootEx<CComMultiThreadModel>,
                                public StreamImpl {
  public:
   UrlmonUploadDataStream() {}
 
   BEGIN_COM_MAP(UrlmonUploadDataStream)
     COM_INTERFACE_ENTRY(ISequentialStream)
     COM_INTERFACE_ENTRY(IStream)
   END_COM_MAP()
 
-  void Initialize(net::UploadData* upload_data);
+  bool Initialize(net::UploadData* upload_data);
 
   // Partial implementation of IStream.
   STDMETHOD(Read)(void* pv, ULONG cb, ULONG* read);
   STDMETHOD(Seek)(LARGE_INTEGER move, DWORD origin, ULARGE_INTEGER* new_pos);
   STDMETHOD(Stat)(STATSTG *pstatstg, DWORD grfStatFlag);
 
  private:
   scoped_refptr<net::UploadData> upload_data_;
   scoped_ptr<net::UploadDataStream> request_body_stream_;
 };
 
 #endif  // CHROME_FRAME_URLMON_UPLOAD_DATA_STREAM_H_