Fix a regression introduced by r33225....

base/file_util_unittest.cc

 // Copyright (c) 2009 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 1138 matching lines @@
   while (top_level != top_level.DirName()) {
     top_level = top_level.DirName();
   }
   ASSERT_TRUE(file_util::DirectoryExists(top_level));
 
   // Given these assumptions hold, it should be safe to
   // test that "creating" these directories succeeds.
   EXPECT_TRUE(file_util::CreateDirectory(
       FilePath(FilePath::kCurrentDirectory)));
   EXPECT_TRUE(file_util::CreateDirectory(top_level));
+
+#if defined(OS_WIN)
+  FilePath invalid_drive(FILE_PATH_LITERAL("o:\\"));
+  FilePath invalid_path =
+      invalid_drive.Append(FILE_PATH_LITERAL("some\\inaccessible\\dir"));
+  if (!file_util::PathExists(invalid_drive)) {
+    EXPECT_FALSE(file_util::CreateDirectory(invalid_path));
+  }
+#endif
 }
 
 TEST_F(FileUtilTest, DetectDirectoryTest) {
   // Check a directory
   FilePath test_root =
       test_dir_.Append(FILE_PATH_LITERAL("detect_directory_test"));
   EXPECT_FALSE(file_util::PathExists(test_root));
   EXPECT_TRUE(file_util::CreateDirectory(test_root));
   EXPECT_TRUE(file_util::PathExists(test_root));
   EXPECT_TRUE(file_util::DirectoryExists(test_root));
@@ skipping 205 matching lines @@
 #elif defined(OS_LINUX)
   EXPECT_FALSE(file_util::ContainsPath(foo,
       foo_caps.Append(FILE_PATH_LITERAL("bar.txt"))));
 #else
   // We can't really do this test on osx since the case-sensitivity of the
   // filesystem is configurable.
 #endif
 }
 
 }  // namespace