Merge virtual mac-antialiasedtext and windows-directwrite test suites

LayoutTests/platform/win-xp/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 800x128
-  RenderBlock {HTML} at (0,0) size 800x128
-    RenderBody {BODY} at (8,16) size 784x96
-      RenderBlock {P} at (0,0) size 784x20
-        RenderInline {NOBR} at (0,0) size 228x19
-          RenderInline {B} at (0,0) size 36x19
-            RenderText {#text} at (0,0) size 36x19
-              text run at (0,0) width 36: "\x{179C}\x{17C9}\x{17C2}\x{1794}"
-          RenderText {#text} at (36,0) size 4x19
-            text run at (36,0) width 4: " "
-          RenderInline {A} at (0,0) size 60x19 [color=#0000EE]
-            RenderText {#text} at (40,0) size 60x19
-              text run at (40,0) width 60: "\x{179A}\x{17BC}\x{1794}\x{1797}\x{17B6}\x{1796}"
-          RenderText {#text} at (100,0) size 4x19
-            text run at (100,0) width 4: " "
-          RenderInline {A} at (0,0) size 36x19 [color=#0000EE]
-            RenderText {#text} at (104,0) size 36x19
-              text run at (104,0) width 36: "\x{1780}\x{17D2}\x{179A}\x{17BB}\x{1798}"
-          RenderText {#text} at (140,0) size 4x19
-            text run at (140,0) width 4: " "
-          RenderInline {A} at (0,0) size 84x19 [color=#0000EE]
-            RenderText {#text} at (144,0) size 84x19
-              text run at (144,0) width 84: "\x{1790}\x{178F}\x{17AF}\x{1780}\x{179F}\x{17B6}\x{179A}"
-        RenderText {#text} at (0,0) size 0x0
-      RenderBlock {P} at (0,36) size 784x60
-        RenderText {#text} at (0,0) size 501x19
-          text run at (0,0) width 501: "Some Harfbuzz shapers will output cluster logs which suggest that some glyphs had "
-        RenderInline {I} at (0,0) size 16x19
-          RenderText {#text} at (501,0) size 16x19
-            text run at (501,0) width 16: "no"
-        RenderText {#text} at (517,0) size 776x39
-          text run at (517,0) width 259: " contributing code points. This test contains"
-          text run at (0,20) width 113: "such text and uses "
-        RenderInline {TT} at (0,0) size 88x16
-          RenderText {#text} at (113,23) size 88x16
-            text run at (113,23) width 88: "eventSender"
-        RenderText {#text} at (201,20) size 427x19
-          text run at (201,20) width 427: " to select the text. You should see some of the above text selected and "
-        RenderInline {TT} at (0,0) size 80x16
-          RenderText {#text} at (628,23) size 80x16
-            text run at (628,23) width 80: "test_shell"
-        RenderText {#text} at (708,20) size 765x39
-          text run at (708,20) width 57: " shouldn't"
-          text run at (0,40) width 183: "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