Merge virtual mac-antialiasedtext and windows-directwrite test suites

LayoutTests/platform/win/virtual/windows-directwrite/fast/text/international/khmer-selection-expected.txt

-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x120
-  RenderBlock {HTML} at (0,0) size 800x120
-    RenderBody {BODY} at (8,16) size 784x88
-      RenderBlock {P} at (0,0) size 784x18
-        RenderInline {NOBR} at (0,0) size 112x17
-          RenderInline {B} at (0,0) size 18x17
-            RenderText {#text} at (0,0) size 18x17
-              text run at (0,0) width 18: "\x{179C}\x{17C9}\x{17C2}\x{1794}"
-          RenderText {#text} at (17,0) size 5x17
-            text run at (17,0) width 5: " "
-          RenderInline {A} at (0,0) size 27x17 [color=#0000EE]
-            RenderText {#text} at (21,0) size 27x17
-              text run at (21,0) width 27: "\x{179A}\x{17BC}\x{1794}\x{1797}\x{17B6}\x{1796}"
-          RenderText {#text} at (47,0) size 5x17
-            text run at (47,0) width 5: " "
-          RenderInline {A} at (0,0) size 17x17 [color=#0000EE]
-            RenderText {#text} at (51,0) size 17x17
-              text run at (51,0) width 17: "\x{1780}\x{17D2}\x{179A}\x{17BB}\x{1798}"
-          RenderText {#text} at (67,0) size 5x17
-            text run at (67,0) width 5: " "
-          RenderInline {A} at (0,0) size 41x17 [color=#0000EE]
-            RenderText {#text} at (71,0) size 41x17
-              text run at (71,0) width 41: "\x{1790}\x{178F}\x{17AF}\x{1780}\x{179F}\x{17B6}\x{179A}"
-        RenderText {#text} at (0,0) size 0x0
-      RenderBlock {P} at (0,34) size 784x54
-        RenderText {#text} at (0,0) size 542x17
-          text run at (0,0) width 542: "Some Harfbuzz shapers will output cluster logs which suggest that some glyphs had "
-        RenderInline {I} at (0,0) size 17x17
-          RenderText {#text} at (541,0) size 17x17
-            text run at (541,0) width 17: "no"
-        RenderText {#text} at (557,0) size 780x35
-          text run at (557,0) width 223: " contributing code points. This test"
-          text run at (0,18) width 178: "contains such text and uses "
-        RenderInline {TT} at (0,0) size 87x15
-          RenderText {#text} at (177,21) size 87x15
-            text run at (177,21) width 87: "eventSender"
-        RenderText {#text} at (263,18) size 447x17
-          text run at (263,18) width 447: " to select the text. You should see some of the above text selected and"
-        RenderInline {TT} at (0,0) size 79x15
-          RenderText {#text} at (0,39) size 79x15
-            text run at (0,39) width 79: "test_shell"
-        RenderText {#text} at (78,36) size 262x17
-          text run at (78,36) width 262: " shouldn't trigger any assertions or crash."
-selection start: position 0 of child 0 {#text} of child 0 {B} of child 1 {NOBR} of child 1 {P} of body
-selection end:   position 7 of child 0 {#text} of child 6 {A} of child 1 {NOBR} of child 1 {P} of body