isButton          499 Source/core/accessibility/AXNodeObject.cpp     return isNativeImage() && isButton();
isButton          677 Source/core/accessibility/AXNodeObject.cpp     if (!isButton())
isButton          312 Source/core/accessibility/AXObject.h     bool isButton() const;
isButton          163 Source/web/WebAXObject.cpp     return m_private->actionElement() || m_private->isButton() || m_private->isMenuRelated();