Add write and read/write support to FileStream (renamed from FileInputStream)...

net/base/upload_data_stream.cc

 // Copyright (c) 2006-2008 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.
 
 #include "net/base/upload_data_stream.h"
 
 #include "base/logging.h"
 #include "net/base/net_errors.h"
 
 namespace net {
@@ skipping 50 matching lines @@
 
       if (bytes_copied == count) {
         advance_to_next_element = true;
       } else {
         next_element_offset_ += bytes_copied;
       }
     } else {
       DCHECK(element.type() == UploadData::TYPE_FILE);
 
       if (!next_element_stream_.IsOpen()) {
-        int rv = next_element_stream_.Open(element.file_path(), false);
+        int flags = base::PLATFORM_FILE_OPEN | 
+                    base::PLATFORM_FILE_READ;
+        int rv = next_element_stream_.Open(element.file_path(), flags);
         // If the file does not exist, that's technically okay.. we'll just
         // upload an empty file.  This is for consistency with Mozilla.
         DLOG_IF(WARNING, rv != OK) << "Failed to open \"" <<
             element.file_path() << "\" for reading: " << rv;
 
         next_element_remaining_ = 0;  // Default to reading nothing.
         if (rv == OK) {
           uint64 offset = element.file_range_offset();
           if (offset && next_element_stream_.Seek(FROM_BEGIN, offset) < 0) {
             DLOG(WARNING) << "Failed to seek \"" << element.file_path() <<
@@ skipping 19 matching lines @@
     if (advance_to_next_element) {
       ++next_element_;
       next_element_offset_ = 0;
       next_element_stream_.Close();
     }
   }
 }
 
 }  // namespace net