Tests which may be converted to reftests

fast/overflow/image-selection-highlight.html
fast/overflow/scrollbar-position-update.html
fast/overflow/table-overflow-float.html
fast/parser/entity-comment-in-style.html
fast/reflections/opacity-reflection-transform.html
fast/repaint/opacity-change-on-overflow-float.html
fast/replaced/absolute-image-sizing.html
fast/replaced/image-resize-width.html
fast/replaced/image-sizing.html
fast/replaced/inline-box-wrapper-handover.html
fast/replaced/maxheight-percent.html
fast/replaced/maxheight-pxs.html
fast/replaced/maxwidth-percent.html
fast/replaced/maxwidth-pxs.html etc.
fast/replaced/selection-rect-in-table-cell.html
fast/ruby/rubyDOM-remove-text2.html
fast/selectors/168.html
fast/table/018.html
fast/table/border-collapsing/border-collapsing-head-foot(-vertical)
fast/table/cell-width-auto.html
fast/table/nested-percent-height-table.html
fast/table/relative-position-stacking.html
fast/table/relative-position-containment.html
fast/table/relative-position-offsets.html
fast/table/row-height-recalc.html
fast/text/basic/012.html
fast/css/hsl-color.html
fast/css/textCapitalizeEdgeCases.html
fast/attachment/attachment-disabled-rendering.html
fast/encoding/denormalised-voiced-japanese-chars
svg/custom/svg-float-border-padding.xml
svg/custom/viewport-em.svg
svg/dom/SVGPathSegList-cloning.html
svg/hixie/text/003.html
svg/zoom/page/zoom-svg-through-object-with-absolute-size(-2).xhtml
svg/custom/gradient-deep-referencing.svg

• fast/table/frame-and-rules-actual.txt - too messy for visual comparison

Phrases to grep:

• "no red"
• "any red"
• "if you see any"
• "should not see"
• "has failed"
• "should be"
• "identical"
• "100 pixels"
• "opendarwin" - very old tests, long before ref tests introduction