Remove unused function template overloads.

third_party/WebKit/Source/core/dom/ElementData.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2014 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 83 matching lines @@
 private:
     friend class Element;
     friend class ShareableElementData;
     friend class UniqueElementData;
     friend class SVGElement;
 
     UniqueElementData* makeUniqueCopy() const;
 };
 
 #define DEFINE_ELEMENT_DATA_TYPE_CASTS(thisType,  pointerPredicate, referencePredicate) \
-    template<typename T> inline thisType* to##thisType(const RefPtr<T>& data) { return to##thisType(data.get()); } \
     DEFINE_TYPE_CASTS(thisType, ElementData, data, pointerPredicate, referencePredicate)
 
 #if COMPILER(MSVC)
 #pragma warning(push)
 #pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning
 #endif
 
 // SharableElementData is managed by ElementDataCache and is produced by
 // the parser during page load for elements that have identical attributes. This
 // is a memory optimization since it's very common for many elements to have
@@ skipping 84 matching lines @@
 }
 
 inline MutableAttributeCollection UniqueElementData::attributes()
 {
     return MutableAttributeCollection(m_attributeVector);
 }
 
 } // namespace blink
 
 #endif // ElementData_h