Bring back multicol reftests that got DRTified for impl-side painting.

LayoutTests/platform/win-xp/virtual/regionbasedmulticol/fast/multicol/layers-in-multicol-expected.txt

Index: LayoutTests/platform/win-xp/virtual/regionbasedmulticol/fast/multicol/layers-in-multicol-expected.txt
diff --git a/LayoutTests/platform/win-xp/virtual/regionbasedmulticol/fast/multicol/layers-in-multicol-expected.txt b/LayoutTests/platform/win-xp/virtual/regionbasedmulticol/fast/multicol/layers-in-multicol-expected.txt
deleted file mode 100644
index 98dfeeb5dc5577006eff766b1978f95ad7475914..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/win-xp/virtual/regionbasedmulticol/fast/multicol/layers-in-multicol-expected.txt
+++ /dev/null
@@ -1,117 +0,0 @@
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-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x320
-  RenderBlock {HTML} at (0,0) size 800x320
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-        RenderText {#text} at (0,0) size 31x19
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-layer at (8,72) size 310x110
-  RenderBlock {DIV} at (0,56) size 310x110 [border: (5px solid #800000)]
-    RenderMultiColumnSet at (5,5) size 300x100
-layer at (13,77) size 100x280
-  RenderMultiColumnFlowThread at (5,5) size 100x280
-    RenderText {#text} at (0,0) size 28x19
-      text run at (0,0) width 28: "line1"
-    RenderBR {BR} at (28,0) size 0x19
-    RenderText {#text} at (0,20) size 28x19
-      text run at (0,20) width 28: "line2"
-    RenderBR {BR} at (28,20) size 0x19
-    RenderText {#text} at (0,40) size 28x19
-      text run at (0,40) width 28: "line3"
-    RenderBR {BR} at (28,40) size 0x19
-    RenderText {#text} at (0,60) size 28x19
-      text run at (0,60) width 28: "line4"
-    RenderBR {BR} at (28,60) size 0x19
-    RenderText {#text} at (0,80) size 28x19
-      text run at (0,80) width 28: "line5"
-    RenderBR {BR} at (28,80) size 0x19
-    RenderText {#text} at (0,100) size 28x19
-      text run at (0,100) width 28: "line6"
-    RenderBR {BR} at (28,100) size 0x19
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-    RenderText {#text} at (16,120) size 32x19
-      text run at (16,120) width 32: " line7"
-    RenderBR {BR} at (48,120) size 0x19
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-    RenderBR {BR} at (28,140) size 0x19
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-      text run at (0,180) width 36: "line10"
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-    RenderBR {BR} at (36,200) size 0x19
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-    RenderBR {BR} at (36,220) size 0x19
-    RenderBR {BR} at (60,240) size 0x19
-    RenderText {#text} at (0,260) size 36x19
-      text run at (0,260) width 36: "line14"
-layer at (8,202) size 310x110
-  RenderBlock {DIV} at (0,186) size 310x110 [border: (5px solid #800000)]
-    RenderMultiColumnSet at (5,5) size 300x100
-layer at (213,207) size 100x280
-  RenderMultiColumnFlowThread at (205,5) size 100x280
-    RenderText {#text} at (72,0) size 28x19
-      text run at (72,0) width 28: "line1"
-    RenderBR {BR} at (72,0) size 0x19
-    RenderText {#text} at (72,20) size 28x19
-      text run at (72,20) width 28: "line2"
-    RenderBR {BR} at (72,20) size 0x19
-    RenderText {#text} at (72,40) size 28x19
-      text run at (72,40) width 28: "line3"
-    RenderBR {BR} at (72,40) size 0x19
-    RenderText {#text} at (72,60) size 28x19
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-      text run at (80,120) width 4 RTL: " "
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-      text run at (64,220) width 36: "line12"
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