Match whole path components in DevicePathToDriveLetterPath(). Add tests.

base/file_util.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
 // This file contains utility functions for dealing with the local
 // filesystem.
 
 #ifndef BASE_FILE_UTIL_H_
 #define BASE_FILE_UTIL_H_
 #pragma once
 
@@ skipping 23 matching lines @@
 #if defined(OS_POSIX)
 #include "base/eintr_wrapper.h"
 #include "base/file_descriptor_posix.h"
 #include "base/logging.h"
 #endif
 
 namespace base {
 class Time;
 }
 
+#if defined (OS_WIN)
+namespace base {
+namespace win {
+class WinApiInterface;
+}
+}
+#endif  // defined (OS_WIN)
+
 namespace file_util {
 
+#if defined (OS_WIN)
+bool DevicePathToDriveLetterPath(base::win::WinApiInterface& win_api,

[rvargas (doing something else), 2012/01/11 22:26:26]

If we put it here so that it has to be accessed by the tests, it needs
documentation, and it has to be exported.

+                                 const FilePath& device_path,
+                                 FilePath* out_drive_letter_path);
+#endif
+
 //-----------------------------------------------------------------------------
 // Functions that operate purely on a path string w/o touching the filesystem:
 
 // Returns true if the given path ends with a path separator character.
 BASE_EXPORT bool EndsWithSeparator(const FilePath& path);
 
 // Makes sure that |path| ends with a separator IFF path is a directory that
 // exists. Returns true if |path| is an existing directory, false otherwise.
 BASE_EXPORT bool EnsureEndsWithSeparator(FilePath* path);
 
@@ skipping 574 matching lines @@
 BASE_EXPORT bool GetFileSystemType(const FilePath& path, FileSystemType* type);
 #endif
 
 }  // namespace file_util
 
 // Deprecated functions have been moved to this separate header file,
 // which must be included last after all the above definitions.
 #include "base/file_util_deprecated.h"
 
 #endif  // BASE_FILE_UTIL_H_