Make tests related to undo word deletion platform independent

LayoutTests/platform/win/editing/undo/undo-forward-delete-boundary-expected.txt

Index: LayoutTests/platform/win/editing/undo/undo-forward-delete-boundary-expected.txt
diff --git a/LayoutTests/platform/win/editing/undo/undo-forward-delete-boundary-expected.txt b/LayoutTests/platform/win/editing/undo/undo-forward-delete-boundary-expected.txt
deleted file mode 100644
index 32cccc219cc47a38184ed13d4acbd38cc81fe35d..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/win/editing/undo/undo-forward-delete-boundary-expected.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-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 {DIV} at (0,0) size 784x84 [border: (2px solid #FF0000)]
-        RenderInline {SPAN} at (0,0) size 722x55
-          RenderText {#text} at (14,14) size 76x27
-            text run at (14,14) width 76: "This wo"
-          RenderInline {B} at (0,0) size 30x26
-            RenderText {#text} at (90,14) size 30x26
-              text run at (90,14) width 30: "rd "
-          RenderText {#text} at (120,14) size 722x55
-            text run at (120,14) width 610: "should be selected, since the test deleted it a character at a time"
-            text run at (730,14) width 6: " "
-            text run at (14,42) width 208: "and then did an undo."
-        RenderText {#text} at (0,0) size 0x0
-selection start: position 5 of child 0 {#text} of child 1 {SPAN} of child 1 {DIV} of body
-selection end:   position 2 of child 0 {#text} of child 1 {B} of child 1 {SPAN} of child 1 {DIV} of body