RenderBlock {P} at (0,56) size 784x20
RenderText {#text} at (0,0) size 308x19
text run at (0,0) width 308: "The thumb should be in the middle of the scroll bar."
-layer at (8,100) size 200x200 clip at (8,100) size 185x200 scrollY 200 scrollHeight 600
+layer at (8,100) size 200x200 clip at (8,100) size 185x200 scrollY 200.00 scrollHeight 600
RenderBlock {DIV} at (0,92) size 200x200
RenderBlock {DIV} at (0,0) size 185x600