[part 1] Make classes and structures in modules/ fast-allocated.

Source/modules/filesystem/HTMLInputElementFileSystem.h

 /*
  * Copyright (C) 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HTMLInputElementFileSystem_h
 #define HTMLInputElementFileSystem_h
 
 #include "modules/filesystem/EntriesCallback.h"
+#include "wtf/Allocator.h"
 
 namespace blink {
 
 class HTMLInputElement;
 class ExecutionContext;
 
 class HTMLInputElementFileSystem {
+    STATIC_ONLY(HTMLInputElementFileSystem);
 public:
     static EntryHeapVector webkitEntries(ExecutionContext*, HTMLInputElement&);
-
-private:
-    HTMLInputElementFileSystem();
-    ~HTMLInputElementFileSystem();
 };
 
 } // namespace blink
 
 #endif // HTMLInputElementFileSystem_h