Remove unused editing related member functions from WebViewClient

LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt

Index: LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt
diff --git a/LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt b/LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt
index adc836cfe0994ccb7ca0ecb93ab1e7a6b074d5fd..ab0d1b34f0d0fd5c05ecdae99f4dedcbbc1e26a6 100644
--- a/LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt
+++ b/LayoutTests/platform/mac/editing/pasteboard/paste-text-016-expected.txt
@@ -1,5 +1,3 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of BODY > HTML > #document to 10 of BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
@@ -7,8 +5,6 @@ EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotificatio
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldDeleteDOMRange:range from 0 of #text > P > DIV > DIV > BODY > HTML > #document to 0 of P > DIV > DIV > BODY > HTML > #document
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of P > DIV > DIV > BODY > HTML > #document to 6 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of P > DIV > DIV > BODY > HTML > #document to 0 of P > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
@@ -17,8 +13,6 @@ EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotificatio
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 2 of P > DIV > DIV > BODY > HTML > #document to 2 of P > DIV > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 13 of #text > P > DIV > DIV > BODY > HTML > #document to 13 of #text > P > DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of DIV > DIV > DIV > BODY > HTML > #document to 0 of DIV > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600