Move PathExists to base namespace.

webkit/browser/dom_storage/session_storage_database.cc

Index: webkit/browser/dom_storage/session_storage_database.cc
diff --git a/webkit/browser/dom_storage/session_storage_database.cc b/webkit/browser/dom_storage/session_storage_database.cc
index f7eaba6193b31eafb7ba0c0b9b99543c8eb3eb82..0d8c572b1ba26cf42ec34da094984740c04cd347 100644
--- a/webkit/browser/dom_storage/session_storage_database.cc
+++ b/webkit/browser/dom_storage/session_storage_database.cc
@@ -279,7 +279,7 @@ bool SessionStorageDatabase::LazyOpen(bool create_if_needed) {
     return true;
 
   if (!create_if_needed &&
-      (!file_util::PathExists(file_path_) ||
+      (!base::PathExists(file_path_) ||
        file_util::IsDirectoryEmpty(file_path_))) {
     // If the directory doesn't exist already and we haven't been asked to
     // create a file on disk, then we don't bother opening the database. This