didChangeVisibilityState 1405 Source/core/dom/Document.cpp void Document::didChangeVisibilityState()
didChangeVisibilityState  226 Source/core/frame/LocalFrame.cpp void LocalFrame::didChangeVisibilityState()
didChangeVisibilityState  635 Source/core/html/HTMLCanvasElement.cpp void HTMLCanvasElement::didChangeVisibilityState(PageVisibilityState visibility)