isHiddenType     1566 Source/core/html/HTMLInputElement.cpp     return m_inputType->isHiddenType();
isHiddenType       52 Source/core/html/forms/HiddenInputType.h     virtual bool isHiddenType() const OVERRIDE;
isHiddenType       85 Source/core/html/forms/InputType.h     virtual bool isHiddenType() const;