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  RenderView at (0,0) size 800x600
layer at (0,0) size 800x50
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      RenderBlock {div} at (0,0) size 784x18
        RenderBlock {p} at (0,0) size 784x18 [bgcolor=#00FF00]
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            text run at (0,0) width 545: "This paragraph should have a green background and there should be no red anywhere."