Remove unused editing related member functions from WebViewClient

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

Index: LayoutTests/platform/win/editing/inserting/insert-after-delete-001-expected.txt
diff --git a/LayoutTests/platform/win/editing/inserting/insert-after-delete-001-expected.txt b/LayoutTests/platform/win/editing/inserting/insert-after-delete-001-expected.txt
index 2caf8e1c302389fbb43707755d82f523a717fc42..fdb043f59f3d7a29f568c61b03502dcac386ce59 100644
--- a/LayoutTests/platform/win/editing/inserting/insert-after-delete-001-expected.txt
+++ b/LayoutTests/platform/win/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