Remove unused editing related member functions from WebViewClient

LayoutTests/editing/execCommand/format-block-expected.txt

Index: LayoutTests/editing/execCommand/format-block-expected.txt
diff --git a/LayoutTests/editing/execCommand/format-block-expected.txt b/LayoutTests/editing/execCommand/format-block-expected.txt
index 829fe48c9e5ab0366e0d5e86b103b7cb610d3e95..af8a4329be1be6d60134d4fe341cca7144a0190e 100644
--- a/LayoutTests/editing/execCommand/format-block-expected.txt
+++ b/LayoutTests/editing/execCommand/format-block-expected.txt
@@ -1,17 +1,12 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 11 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 2 of DIV > BODY > HTML > #document to 2 of DIV > BODY > HTML > #document toDOMRange:range from 0 of PRE > DIV > BODY > HTML > #document to 0 of PRE > 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 > DIV > BODY > HTML > #document to 3 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of H1 > DIV > DIV > BODY > HTML > #document to 0 of H1 > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: webViewDidEndEditing:WebViewDidEndEditingNotification
 This test uses FormatBlock to modify three of the paragraphs below
 
 Before FormatBlock: