Merge virtual mac-antialiasedtext and windows-directwrite test suites

LayoutTests/platform/win/virtual/windows-directwrite/fast/text/word-break-run-rounding-expected.txt

-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  RenderBlock {HTML} at (0,0) size 800x600
-    RenderBody {BODY} at (8,8) size 784x584
-      RenderBlock {P} at (0,0) size 784x18
-        RenderText {#text} at (0,0) size 61x17
-          text run at (0,0) width 61: "Tests for "
-        RenderInline {I} at (0,0) size 716x17
-          RenderInline {A} at (0,0) size 306x17 [color=#0000EE]
-            RenderText {#text} at (60,0) size 306x17
-              text run at (60,0) width 306: "http://bugs.webkit.org/show_bug.cgi?id=13438"
-          RenderText {#text} at (365,0) size 411x17
-            text run at (365,0) width 5: " "
-            text run at (369,0) width 407: "Run rounding makes word-break:break-all/word not functional"
-        RenderText {#text} at (775,0) size 5x17
-          text run at (775,0) width 5: "."
-      RenderBlock {P} at (0,34) size 784x18
-        RenderText {#text} at (0,0) size 316x17
-          text run at (0,0) width 316: "Test that the preferred (maximum) width is right:"
-      RenderBlock (floating) {DIV} at (0,68) size 599.63x24 [border: (3px solid #000000)]
-        RenderText {#text} at (3,3) size 594x17
-          text run at (3,3) width 594: "The black border should fit tightly around this one line of text with no space after the period."
-      RenderBlock (anonymous) at (0,68) size 784x24
-        RenderBR {BR} at (599,0) size 1x17
-      RenderBlock {P} at (0,108) size 784x18
-        RenderText {#text} at (0,0) size 389x17
-          text run at (0,0) width 389: "Test that text does not wrap too early due to rounding errors:"
-      RenderBlock {DIV} at (0,142) size 431x24 [border: (3px solid #000000)]
-        RenderText {#text} at (3,3) size 351x17
-          text run at (3,3) width 351: "This text fits nicely on a single line of the given width."
-      RenderBlock {P} at (0,182) size 784x18
-        RenderText {#text} at (0,0) size 234x17
-          text run at (0,0) width 234: "Test that text does not wrap too late:"
-      RenderBlock {DIV} at (0,216) size 597x42 [border: (3px solid #000000)]
-        RenderText {#text} at (3,3) size 588x35
-          text run at (3,3) width 389: "J u s t a b u n c h o f l e t t e r s h e r e , n o t h i n g t o s e e . "
-          text run at (391,3) width 200: "Thisisonebigwordwhichisveryl"
-          text run at (3,21) width 28: "ong."