Make tests related to undo word deletion platform independent

LayoutTests/platform/win/editing/undo/undo-combined-delete-expected.txt

Index: LayoutTests/platform/win/editing/undo/undo-combined-delete-expected.txt
diff --git a/LayoutTests/platform/win/editing/undo/undo-combined-delete-expected.txt b/LayoutTests/platform/win/editing/undo/undo-combined-delete-expected.txt
deleted file mode 100644
index 2f30ab4afab2f80a499aa97b80c0e2cbb9d6f33c..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/win/editing/undo/undo-combined-delete-expected.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-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: 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 756x55
-          RenderText {#text} at (14,14) size 756x55
-            text run at (14,14) width 753: "This word should be selected, since the test deleted it a character at a time and"
-            text run at (767,14) width 3: " "
-            text run at (14,42) width 167: "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 9 of child 0 {#text} of child 1 {SPAN} of child 1 {DIV} of body