Created attachment 468496 [details] test case [TextureMapper] a rendering artifact of tooltip balloon at results.webkit.org 1. Start Windows MiniBrowser 2. Load https://results.webkit.org/?suite=layout-tests&test=fast%2Fcss%2F001.html 3. Move the mouse cursor to the revision identifier Actual: The tooltip balloon has a square box at the top Actual: The tooltip balloon should have a triangle at the top
<rdar://problem/118345802>