computeBackgroundIsKnownToBeObscured  637 Source/core/rendering/RenderBox.h     virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE;
computeBackgroundIsKnownToBeObscured   96 Source/core/rendering/RenderImage.h     virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE FINAL;
computeBackgroundIsKnownToBeObscured  660 Source/core/rendering/RenderObject.h     virtual bool computeBackgroundIsKnownToBeObscured() { return false; }
computeBackgroundIsKnownToBeObscured 1400 Source/core/rendering/RenderObject.h         BoxDecorationState boxDecorationState = computeBackgroundIsKnownToBeObscured() ? HasBoxDecorationsAndBackgroundIsKnownToBeObscured : HasBoxDecorationsAndBackgroundMayBeVisible;