Rewrite fast/multicol/*nested-columns.html as reftests.

LayoutTests/platform/linux/fast/multicol/nested-columns-expected.txt

Index: LayoutTests/platform/linux/fast/multicol/nested-columns-expected.txt
diff --git a/LayoutTests/platform/linux/fast/multicol/nested-columns-expected.txt b/LayoutTests/platform/linux/fast/multicol/nested-columns-expected.txt
deleted file mode 100644
index 7dec752ada345206ba94a5988c10c6093e66d673..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/linux/fast/multicol/nested-columns-expected.txt
+++ /dev/null
@@ -1,79 +0,0 @@
-layer at (0,0) size 800x600 scrollWidth 1141
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  LayoutBlockFlow {HTML} at (0,0) size 800x600
-layer at (8,8) size 750x500
-  LayoutBlockFlow {BODY} at (8,8) size 750x500
-    LayoutBlockFlow {H1} at (0,0) size 367x37
-      LayoutText {#text} at (0,0) size 166x36
-        text run at (0,0) width 166: "Header One"
-    LayoutBlockFlow (anonymous) at (0,58.44) size 367x220
-      LayoutText {#text} at (0,0) size 367x219
-        text run at (0,0) width 337: "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."
-        text run at (0,20) width 367: "Nulla varius enim ac mi. Curabitur sollicitudin felis quis lectus."
-        text run at (0,40) width 362: "Quisque adipiscing rhoncus sem. Proin nulla purus, vulputate"
-        text run at (0,60) width 358: "vel, varius ut, euismod et, nisi. Sed vitae felis vel orci sagittis"
-        text run at (0,80) width 365: "aliquam. Cras convallis adipiscing sem. Nam nonummy enim."
-        text run at (0,100) width 329: "Nullam bibendum lobortis neque. Vestibulum velit orci,"
-        text run at (0,120) width 309: "tempus euismod, pretium quis, interdum vitae, nulla."
-        text run at (0,140) width 321: "Phasellus eget ante et tortor condimentum vestibulum."
-        text run at (0,160) width 360: "Suspendisse hendrerit quam nec felis. Sed varius turpis vitae"
-        text run at (0,180) width 350: "pede. Lorem ipsum dolor sit amet, consectetuer adipiscing"
-        text run at (0,200) width 21: "elit."
-    LayoutBlockFlow {H1} at (0,299.88) size 367x37
-      LayoutText {#text} at (0,0) size 169x36
-        text run at (0,0) width 169: "Header Two"
-    LayoutBlockFlow (anonymous) at (0,358.31) size 367x221.69
-      LayoutText {#text} at (0,0) size 367x221
-        text run at (0,0) width 337: "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."
-        text run at (0,20) width 367: "Nulla varius enim ac mi. Curabitur sollicitudin felis quis lectus."
-        text run at (0,40) width 362: "Quisque adipiscing rhoncus sem. Proin nulla purus, vulputate"
-        text run at (0,60) width 358: "vel, varius ut, euismod et, nisi. Sed vitae felis vel orci sagittis"
-        text run at (0,80) width 365: "aliquam. Cras convallis adipiscing sem. Nam nonummy enim."
-        text run at (0,100) width 329: "Nullam bibendum lobortis neque. Vestibulum velit orci,"
-        text run at (0,120) width 309: "tempus euismod, pretium quis, interdum vitae, nulla."
-        text run at (0,141) width 321: "Phasellus eget ante et tortor condimentum vestibulum."
-        text run at (0,162) width 360: "Suspendisse hendrerit quam nec felis. Sed varius turpis vitae"
-        text run at (0,182) width 350: "pede. Lorem ipsum dolor sit amet, consectetuer adipiscing"
-        text run at (0,202) width 21: "elit."
-    LayoutBlockFlow {H1} at (0,601.44) size 367x37
-      LayoutText {#text} at (0,0) size 190x36
-        text run at (0,0) width 190: "Header Three"
-    LayoutBlockFlow {H1} at (0,921.31) size 367x37
-      LayoutText {#text} at (0,0) size 177x36
-        text run at (0,0) width 177: "Header Four"
-    LayoutBlockFlow (anonymous) at (0,979.75) size 367x40.25
-      LayoutText {#text} at (0,0) size 337x40
-        text run at (0,0) width 337: "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."
-        text run at (0,20) width 143: "Nulla varius enim ac mi."
-layer at (8,668) size 367x240 backgroundClip at (0,0) size 800x600 clip at (0,0) size 800x600 outlineClip at (0,0) size 800x600
-  LayoutBlockFlow {DIV} at (0,659.88) size 367x240
-    LayoutText {#text} at (0,0) size 175x419
-      text run at (0,0) width 169: "Lorem ipsum dolor sit amet,"
-      text run at (0,20) width 164: "consectetuer adipiscing elit."
-      text run at (0,40) width 143: "Nulla varius enim ac mi."
-      text run at (0,60) width 150: "Curabitur sollicitudin felis"
-      text run at (0,80) width 120: "quis lectus. Quisque"
-      text run at (0,100) width 142: "adipiscing rhoncus sem."
-      text run at (0,120) width 162: "Proin nulla purus, vulputate"
-      text run at (0,140) width 152: "vel, varius ut, euismod et,"
-      text run at (0,160) width 158: "nisi. Sed vitae felis vel orci"
-      text run at (0,180) width 127: "sagittis aliquam. Cras"
-      text run at (0,200) width 146: "convallis adipiscing sem."
-      text run at (0,220) width 175: "Nam nonummy enim. Nullam"
-      text run at (0,240) width 152: "bibendum lobortis neque."
-      text run at (0,260) width 173: "Vestibulum velit orci, tempus"
-      text run at (0,280) width 135: "euismod, pretium quis,"
-      text run at (0,300) width 123: "interdum vitae, nulla."
-      text run at (0,320) width 166: "Phasellus eget ante et tortor"
-      text run at (0,340) width 151: "condimentum vestibulum."
-      text run at (0,360) width 168: "Suspendisse hendrerit quam"
-      text run at (0,380) width 156: "nec felis. Sed varius turpis"
-      text run at (0,400) width 70: "vitae pede. "
-    LayoutText {#text} at (0,0) size 0x0
-layer at (8,668) size 166x59 backgroundClip at (0,0) size 800x600 clip at (0,0) size 800x600 outlineClip at (0,0) size 800x600 transparent
-  LayoutInline (relative positioned) {SPAN} at (0,0) size 166x59
-    LayoutText {#text} at (70,400) size 166x59
-      text run at (70,400) width 79: "Lorem ipsum"
-      text run at (0,420) width 166: "dolor sit amet, consectetuer"
-      text run at (0,440) width 84: "adipiscing elit."