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

net/disk_cache/os_file_win.cc

Index: net/disk_cache/os_file_win.cc
===================================================================
--- net/disk_cache/os_file_win.cc	(revision 4450)
+++ net/disk_cache/os_file_win.cc	(working copy)
@@ -1,57 +0,0 @@
-// 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/disk_cache/os_file.h"
-
-#include "base/logging.h"
-
-namespace disk_cache {
-
-OSFile CreateOSFile(const std::wstring& name, int flags, bool* created) {
-  DWORD disposition = 0;
-
-  if (flags & OS_FILE_OPEN)
-    disposition = OPEN_EXISTING;
-
-  if (flags & OS_FILE_CREATE) {
-    DCHECK(!disposition);
-    disposition = CREATE_NEW;
-  }
-
-  if (flags & OS_FILE_OPEN_ALWAYS) {
-    DCHECK(!disposition);
-    disposition = OPEN_ALWAYS;
-  }
-
-  if (flags & OS_FILE_CREATE_ALWAYS) {
-    DCHECK(!disposition);
-    disposition = CREATE_ALWAYS;
-  }
-
-  if (!disposition) {
-    NOTREACHED();
-    return NULL;
-  }
-
-  DWORD access = (flags & OS_FILE_READ) ? GENERIC_READ : 0;
-  if (flags & OS_FILE_WRITE)
-    access |= GENERIC_WRITE;
-
-  DWORD sharing = (flags & OS_FILE_SHARE_READ) ? FILE_SHARE_READ : 0;
-  if (flags & OS_FILE_SHARE_WRITE)
-    access |= FILE_SHARE_WRITE;
-
-  HANDLE file = CreateFile(name.c_str(), access, sharing, NULL, disposition, 0,
-                           NULL);
-
-  if ((flags & OS_FILE_OPEN_ALWAYS) && created &&
-      INVALID_HANDLE_VALUE != file) {
-    *created = (ERROR_ALREADY_EXISTS != GetLastError());
-  }
-
-  return file;
-}
-
-}  // namespace disk_cache
-