[Mac] Convert Omnibox paste-and-go to use AutocompleteTextFieldObserver.

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 
 #include <Carbon/Carbon.h>  // kVK_Return
 #include "app/gfx/font.h"
 #include "app/l10n_util_mac.h"
 #include "app/resource_bundle.h"
@@ skipping 844 matching lines @@
 
 - (BOOL)control:(NSControl*)control textShouldEndEditing:(NSText*)fieldEditor {
   edit_view_->OnDidEndEditing();
 
   return YES;
 
   // TODO(shess): Figure out where the selection belongs.  On GTK,
   // it's set to the start of the text.
 }
 
-- (NSString*)control:(NSControl*)control
-             textPasteActionString:(NSText*)fieldEditor {
-  if (!edit_view_->CanPasteAndGo())
-    return nil;
-
-  return l10n_util::GetNSStringWithFixup(edit_view_->GetPasteActionStringId());
-}
-
-- (void)control:(NSControl*)control textDidPasteAndGo:(NSText*)fieldEditor {
-  edit_view_->OnPasteAndGo();
-}
-
 // Signal that we've lost focus when the window resigns key.
 - (void)windowDidResignKey:(NSNotification*)notification {
   edit_view_->OnDidResignKey();
 }
 
 @end