Remove unused editing related member functions from WebViewClient

LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt

Index: LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt
diff --git a/LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt b/LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt
index 1efc2f1c5c8327dc2530d63c43966fb8f75bd047..18f300c196e129c67cb1a5d3b1d61f63e872b1c2 100644
--- a/LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt
+++ b/LayoutTests/platform/mac/editing/execCommand/insert-list-and-stitch-expected.txt
@@ -1,15 +1,10 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 7 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 1 of DIV > DIV > BODY > HTML > #document to 1 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of LI > OL > DIV > DIV > BODY > HTML > #document to 0 of LI > OL > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 3 of DIV > BODY > HTML > #document to 3 of DIV > BODY > HTML > #document toDOMRange:range from 0 of LI > OL > DIV > DIV > BODY > HTML > #document to 0 of LI > OL > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 4 of DIV > BODY > HTML > #document to 4 of DIV > BODY > HTML > #document toDOMRange:range from 0 of LI > OL > DIV > DIV > BODY > HTML > #document to 0 of LI > OL > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600