In the attached testcase we have an overflow clip with a transform node. The text should be visible but instead it gets clipped out.

I think we're using the wrong transform space for overflow clip:
With transform:
PreTranslation 0x1108e3d7cd30 transform=translation=0.000000,0.000000,0.000000
  ScrollTranslation 0x1108e3d7ce10 transform=translation=0.000000,0.000000,0.000000
    PaintOffsetTranslation 0x1108e3d7cef0 transform=translation=20.000000,20.000000,0.000000
      Transform 0x1108e3d7cfd0 transform=translation=1.000000,1.000000,1.000000
ContentClip 0x1108e3ca4358 localTransformSpace=0x1108e3d7cd30 rect=0.000000,0.000000,1078.000000,707.000000
  OverflowClip 0x1108e3ca4448 localTransformSpace=0x1108e3d7cfd0 rect=0.000000,0.000000,185.000000,185.000000

Without transform:
PreTranslation 0x1108e3d7c470 transform=translation=0.000000,0.000000,0.000000
  ScrollTranslation 0x1108e3d7cef0 transform=translation=0.000000,0.000000,0.000000
ContentClip 0x1108e3ca4628 localTransformSpace=0x1108e3d7c470 rect=0.000000,0.000000,1078.000000,707.000000
  OverflowClip 0x1108e3ca4448 localTransformSpace=0x1108e3d7cef0 rect=20.000000,20.000000,185.000000,185.000000
 

Deleted: overflowClipBug.html 303 bytes

overflowClipBug.html 303 bytes View Download