Remove unused editing related member functions from WebViewClient

LayoutTests/platform/win/editing/pasteboard/smart-paste-007-expected.txt

-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 > DIV > BODY > HTML > #document to 0 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 5 of #text > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldDeleteDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 5 of #text > DIV > DIV > BODY > HTML > #document
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 0 of DIV > DIV > BODY > HTML > #document to 0 of DIV > DIV > BODY > HTML > #document toDOMRange:range from 0 of DIV > DIV > BODY > HTML > #document to 0 of DIV > 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 > DIV > BODY > HTML > #document to 1 of #text > DIV > DIV > BODY > HTML > #document toDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 1 of #text > DIV > 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 > DIV > BODY > HTML > #document to 1 of #text > DIV > DIV > BODY > HTML > #document toDOMRange:range from 2 of #text > DIV > DIV > BODY > HTML > #document to 2 of #text > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldInsertNode:#document-fragment replacingDOMRange:range from 1 of #text > DIV > DIV > BODY > HTML > #document to 1 of #text > DIV > DIV > BODY > HTML > #document givenAction:WebViewInsertActionPasted
+EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: shouldChangeSelectedDOMRange:range from 7 of #text > DIV > DIV > BODY > HTML > #document to 7 of #text > DIV > DIV > BODY > HTML > #document toDOMRange:range from 6 of #text > DIV > DIV > BODY > HTML > #document to 6 of #text > DIV > DIV > BODY > HTML > #document affinity:NSSelectionAffinityDownstream stillSelecting:FALSE
+EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
+EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
+EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
 EDITING DELEGATE: webViewDidChange:WebViewDidChangeNotification
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
 layer at (0,0) size 800x600
   RenderBlock {HTML} at (0,0) size 800x600
     RenderBody {BODY} at (8,8) size 784x584
       RenderBlock {DIV} at (0,0) size 784x210 [border: (2px solid #0000FF)]
         RenderBlock {DIV} at (14,14) size 756x55
           RenderText {#text} at (0,0) size 66x26
             text run at (0,0) width 66: "Tests: "
           RenderBR {BR} at (0,0) size 0x0
           RenderText {#text} at (0,27) size 455x27
             text run at (0,27) width 455: "Smart paste when pasting between two periods."
         RenderBlock {DIV} at (14,85) size 756x111
           RenderText {#text} at (0,0) size 189x26
             text run at (0,0) width 189: "Expected Results: "
           RenderBR {BR} at (189,21) size 0x0
           RenderText {#text} at (0,27) size 741x55
             text run at (0,27) width 741: "A space should be added before, but not after the pasted word. It should look"
             text run at (0,55) width 87: "like this: "
           RenderBR {BR} at (87,76) size 0x0
           RenderText {#text} at (0,83) size 52x27
             text run at (0,83) width 52: ". test."
       RenderBlock {DIV} at (0,234) size 784x32
         RenderBlock {DIV} at (0,0) size 784x32 [border: (2px solid #FF0000)]
           RenderText {#text} at (2,2) size 52x27
             text run at (2,2) width 52: ". test."
 caret: position 6 of child 0 {#text} of child 1 {DIV} of child 3 {DIV} of body