Remove ".." from PathService take #2.

base/path_service.cc

Index: base/path_service.cc
diff --git a/base/path_service.cc b/base/path_service.cc
index 2697653b39ef1699ad330814fdd54e9e3227b2f7..aa53b0d0eba81efd25747b3f26f1b83d8695a54f 100644
--- a/base/path_service.cc
+++ b/base/path_service.cc
@@ -209,6 +209,12 @@ bool PathService::Get(int key, FilePath* result) {
   if (path.empty())
     return false;
 
+  if (path.ReferencesParent()) {
+    // Make sure path service never returns a path with ".." in it.
+    if (!file_util::AbsolutePath(&path)) {
+      return false;
+    }
+  }
   *result = path;
 
   base::AutoLock scoped_lock(path_data->lock);