Remove unused editing related member functions from WebViewClient

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

Index: LayoutTests/platform/mac/editing/pasteboard/smart-paste-008-expected.txt
diff --git a/LayoutTests/platform/mac/editing/pasteboard/smart-paste-008-expected.txt b/LayoutTests/platform/mac/editing/pasteboard/smart-paste-008-expected.txt
index 8793cadd3910035c09df7458ff10335172579fb2..5402d4f7d7a222c0a7010abb5cf43f65bd42b22e 100644
--- a/LayoutTests/platform/mac/editing/pasteboard/smart-paste-008-expected.txt
+++ b/LayoutTests/platform/mac/editing/pasteboard/smart-paste-008-expected.txt
@@ -1,16 +1,10 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 2 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > DIV > BODY > HTML > #document to 0 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of DIV > DIV > BODY > HTML > #document to 0 of DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > DIV > BODY > HTML > #document to 0 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of #text > DIV > DIV > BODY > HTML > #document to 3 of #text > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 1 of #text > DIV > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 1 of DIV > BODY > HTML > #document toDOMRange:range from 5 of #text > DIV > DIV > BODY > HTML > #document to 5 of #text > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600