Remove unused editing related member functions from WebViewClient

LayoutTests/platform/mac/editing/pasteboard/paste-text-009-expected.txt

Index: LayoutTests/platform/mac/editing/pasteboard/paste-text-009-expected.txt
diff --git a/LayoutTests/platform/mac/editing/pasteboard/paste-text-009-expected.txt b/LayoutTests/platform/mac/editing/pasteboard/paste-text-009-expected.txt
index 40ddc030a9f9a9b4304a10129270aa856dd6d73c..0f9e16265f46a3bce6f67f3bf41754b7e0ae6125 100644
--- a/LayoutTests/platform/mac/editing/pasteboard/paste-text-009-expected.txt
+++ b/LayoutTests/platform/mac/editing/pasteboard/paste-text-009-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
@@ -79,14 +77,10 @@ EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotificatio
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 37 of #text > DIV > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 37 of #text > DIV > DIV > BODY > HTML > #document to 39 of #text > DIV > BODY > HTML > #document toDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 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 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document toDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600