Remove unused editing related member functions from WebViewClient

LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt

Index: LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt
diff --git a/LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt b/LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt
index aee46c29540b619acf71a23c52e4053a90563af7..2ee515d0c9bd4a01421028dc339e93a02d98f5cf 100644
--- a/LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt
+++ b/LayoutTests/platform/mac/editing/inserting/insert-after-delete-001-expected.txt
@@ -1,18 +1,11 @@
-EDITING DELEGATE: shouldBeginEditingInDOMRange:range from 0 of DIV > BODY > HTML > #document to 3 of DIV > BODY > HTML > #document
-EDITING DELEGATE: webViewDidBeginEditing:WebViewDidBeginEditingNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of DIV > BODY > HTML > #document toDOMRange:range from 0 of #text > SPAN > DIV > BODY > HTML > #document to 4 of #text > SPAN > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldDeleteDOMRange:range from 0 of #text > SPAN > DIV > BODY > HTML > #document to 4 of #text > SPAN > DIV > BODY > HTML > #document
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > BODY > HTML > #document to 0 of 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: shouldChangeSelectedDOMRange:range from 1 of #text > DIV > BODY > HTML > #document to 1 of #text > DIV > BODY > HTML > #document toDOMRange:range from 2 of #text > DIV > BODY > HTML > #document to 2 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 2 of #text > DIV > BODY > HTML > #document to 2 of #text > DIV > BODY > HTML > #document toDOMRange:range from 3 of #text > DIV > BODY > HTML > #document to 3 of #text > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600