Fix three Windows base_unittests to not require admin

base/files/file_util_unittest.cc

 // 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.
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 116 matching lines @@
   return true;
 }
 
 // Manages a reparse point for a test.
 class ReparsePoint {
  public:
   // Creates a reparse point from |source| (an empty directory) to |target|.
   ReparsePoint(const FilePath& source, const FilePath& target) {
     dir_.Set(
       ::CreateFile(source.value().c_str(),
-                   FILE_ALL_ACCESS,
+                   GENERIC_READ | GENERIC_WRITE,
                    FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
                    NULL,
                    OPEN_EXISTING,
                    FILE_FLAG_BACKUP_SEMANTICS,  // Needed to open a directory.
                    NULL));
     created_ = dir_.IsValid() && SetReparsePoint(dir_.Get(), target);
   }
 
   ~ReparsePoint() {
     if (created_)
@@ skipping 2370 matching lines @@
   // Trying to close it should crash. This is important for security.
   EXPECT_DEATH(CloseWithScopedFD(fds[1]), "");
 #endif
 }
 
 #endif  // defined(OS_POSIX)
 
 }  // namespace
 
 }  // namespace base