Oilpan: move core/fileapi to oilpan's heap.

Source/core/fileapi/FileList.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 
 Vector<String> FileList::paths() const
 {
     Vector<String> paths;
     for (unsigned i = 0; i < m_files.size(); ++i)
         paths.append(m_files[i]->path());
 
     return paths;
 }
 
+void FileList::trace(Visitor* visitor)
+{
+    visitor->trace(m_files);
+}
+
 } // namespace WebCore