Remove file_util::TrimTrailingSeparators(), which is deprecated and...

base/file_util_posix.cc

Index: base/file_util_posix.cc
===================================================================
--- base/file_util_posix.cc	(revision 28937)
+++ base/file_util_posix.cc	(working copy)
@@ -61,9 +61,9 @@
 
 std::wstring GetDirectoryFromPath(const std::wstring& path) {
   if (EndsWithSeparator(path)) {
-    std::wstring dir = path;
-    TrimTrailingSeparator(&dir);
-    return dir;
+    return FilePath::FromWStringHack(path)
+        .StripTrailingSeparators()
+        .ToWStringHack();
   } else {
     char full_path[PATH_MAX];
     base::strlcpy(full_path, WideToUTF8(path).c_str(), arraysize(full_path));