Update AutocompleteTextFieldEditor to use non-deprecated dragging APIs.

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
index 9c302858d9a97000fee92170850bad3e401e560a..b7a4d84bfbd9e1b738b1389ee6993e84b54e97fb 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.h
@@ -45,8 +45,11 @@ class AutocompleteTextFieldObserver {
   // Return |true| if there is a selection to copy.
   virtual bool CanCopy() = 0;
 
-  // Clears the |pboard| and adds the field's current selection.
-  // Called when the user does a copy or drag.
+  // Creates a pasteboard item from the field's current selection.
+  virtual base::scoped_nsobject<NSPasteboardItem> CreatePasteboardItem() = 0;
+
+  // Copies the pasteboard item returned from |CreatePasteboardItem()| to
+  // |pboard|.
   virtual void CopyToPasteboard(NSPasteboard* pboard) = 0;
 
   // Returns true if the Show URL option should be available.