Remove unused editing related member functions from WebViewClient

LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt

Index: LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt
diff --git a/LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt b/LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt
index 5cb7f22ce6acfd6911dfc4479e437bb57bcc3672..bfa6d0be5c706c609c0fe446fe51360eccc0d24d 100644
--- a/LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt
+++ b/LayoutTests/platform/mac/editing/pasteboard/paste-text-008-expected.txt
@@ -1,5 +1,3 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of BODY > HTML > #document to 4 of BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
@@ -98,14 +96,10 @@ EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotificatio
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 12 of #text > DIV > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 11 of #text > DIV > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document toDOMRange:range from 20 of #text > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 20 of #text > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 20 of #text > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document toDOMRange:range from 20 of #text > DIV > BODY > HTML > #document to 20 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600