Deprecate PathService::Get(..., wstring*) and use FilePath instead.

base/base_paths_win.cc

Index: base/base_paths_win.cc
diff --git a/base/base_paths_win.cc b/base/base_paths_win.cc
index 89c2ff32b29e2e14766a3d1a68f904fc259cb81d..bc8566c6fe03e41272e2e1bf2b6c759fb240f27f 100644
--- a/base/base_paths_win.cc
+++ b/base/base_paths_win.cc
@@ -102,10 +102,8 @@ bool PathProviderWin(int key, FilePath* result) {
     case base::DIR_SOURCE_ROOT:
       // On Windows, unit tests execute two levels deep from the source root.
       // For example:  chrome/{Debug|Release}/ui_tests.exe
-      PathService::Get(base::DIR_EXE, &wstring_path);
-      file_util::UpOneDirectory(&wstring_path);
-      file_util::UpOneDirectory(&wstring_path);
-      cur = FilePath(wstring_path);
+      PathService::Get(base::DIR_EXE, &cur);
+      cur = cur.DirName().DirName();
       break;
     default:
       return false;