ExemptIFrameAllowFullScreenRequirement 3182 Source/core/html/HTMLMediaElement.cpp     FullscreenElementStack::from(document()).requestFullScreenForElement(this, 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);
ExemptIFrameAllowFullScreenRequirement  487 Source/core/html/shadow/MediaControlElements.cpp             FullscreenElementStack::from(document()).requestFullScreenForElement(&mediaElement(), 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);