Remove unused editing related member functions from WebViewClient

LayoutTests/editing/pasteboard/styled-element-markup-expected.txt

Index: LayoutTests/editing/pasteboard/styled-element-markup-expected.txt
diff --git a/LayoutTests/editing/pasteboard/styled-element-markup-expected.txt b/LayoutTests/editing/pasteboard/styled-element-markup-expected.txt
index 286c3e4994ff1eaaf087be4143bf499eab9259f6..e721284829b355eeb72c3a477f1bb4f329412c92 100644
--- a/LayoutTests/editing/pasteboard/styled-element-markup-expected.txt
+++ b/LayoutTests/editing/pasteboard/styled-element-markup-expected.txt
@@ -1,15 +1,6 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 1 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of CENTER > DIV > BODY > HTML > #document to 0 of CENTER > DIV > BODY > HTML > #document toDOMRange:range from 0 of CENTER > DIV > BODY > HTML > #document to 1 of CENTER > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldEndEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 1 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidEndEditing:WebViewDidEndEditingNotification
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document toDOMRange:range from 1 of DIV > BODY > HTML > #document to 1 of DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600