Remove file_util::TrimTrailingSeparators(), which is deprecated and
doesn't work well for Windows root drives.

BUG=24722
TEST=existing tests are enough.
Review URL: http://codereview.chromium.org/271086

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29093 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 2c8088a4452c2c204237ba9f2f3706e7eeaaf35b
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index cde98a0..40a4163 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -297,7 +297,7 @@
   {L"C:\\WINDOWS\\system32\\\\", L"C:\\WINDOWS\\system32"},
   {L"C:\\WINDOWS\\system32", L"C:\\WINDOWS"},
   {L"C:\\WINDOWS\\system32.\\", L"C:\\WINDOWS\\system32."},
-  {L"C:\\", L"C:"},
+  {L"C:\\", L"C:\\"},
 #elif defined(OS_POSIX)
   {L"/foo/bar/gdi32.dll", L"/foo/bar"},
   {L"/foo/bar/not_exist_thx_1138", L"/foo/bar"},