Turn on file access checks on Win.

chrome/common/chrome_version_info.cc

 // Copyright (c) 2010 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 "chrome/common/chrome_version_info.h"
 
 #include "base/basictypes.h"
 #include "base/file_version_info.h"
 #include "base/string_util.h"
+#include "base/thread_restrictions.h"
 #include "build/build_config.h"
 
 namespace chrome {
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
 // On Windows and Mac, we get the Chrome version info by querying
 // FileVersionInfo for the current module.
 
 VersionInfo::VersionInfo() {
+  // The current module is already loaded in memory, so this will be cheap.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
   version_info_.reset(FileVersionInfo::CreateFileVersionInfoForCurrentModule());
 }
 
 VersionInfo::~VersionInfo() {
 }
 
 bool VersionInfo::is_valid() const {
   return version_info_.get() != NULL;
 }
 
@@ skipping 49 matching lines @@
   return LAST_CHANGE;
 }
 
 bool VersionInfo::IsOfficialBuild() const {
   return OFFICIAL_BUILD;
 }
 
 #endif
 
 }  // namespace chrome