supportsRequired 1388 Source/core/html/HTMLInputElement.cpp     return m_inputType->supportsRequired() && isRequired();
supportsRequired   57 Source/core/html/forms/ColorInputType.h     virtual bool supportsRequired() const OVERRIDE;
supportsRequired  130 Source/core/html/forms/InputType.h     virtual bool supportsRequired() const;
supportsRequired   53 Source/core/html/forms/RangeInputType.h     virtual bool supportsRequired() const OVERRIDE;
supportsRequired   46 Source/core/html/forms/SubmitInputType.h     virtual bool supportsRequired() const OVERRIDE;