Merge virtual mac-antialiasedtext and windows-directwrite test suites

LayoutTests/platform/win-xp/virtual/windows-directwrite/fast/text/international/rtl-caret-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 784x40
-        RenderText {#text} at (0,0) size 164x19
-          text run at (0,0) width 164: "This is a regression test for "
-        RenderInline {I} at (0,0) size 771x39
-          RenderInline {A} at (0,0) size 350x19 [color=#0000EE]
-            RenderText {#text} at (164,0) size 350x19
-              text run at (164,0) width 350: "http://bugzilla.opendarwin.org/show_bug.cgi?id=8866"
-          RenderText {#text} at (514,0) size 771x39
-            text run at (514,0) width 4: " "
-            text run at (518,0) width 253: "REGRESSION: Incorrect caret position"
-            text run at (0,20) width 72: "in RTL text"
-        RenderText {#text} at (72,20) size 4x19
-          text run at (72,20) width 4: "."
-      RenderBlock {P} at (0,56) size 784x20
-        RenderText {#text} at (0,0) size 330x19
-          text run at (0,0) width 330: "The caret should be in the middle of the Hebrew word."
-      RenderBlock {HR} at (0,92) size 784x2 [border: (1px inset #EEEEEE)]
-      RenderBlock {DIV} at (0,102) size 784x20
-        RenderText {#text} at (0,0) size 48x19
-          text run at (0,0) width 48 RTL: "\x{5D0}\x{5D5}\x{5DB}\x{5DE}\x{5E0}\x{5D9}\x{5D5}\x{5EA}"
-caret: position 5 of child 0 {#text} of child 7 {DIV} of body