Introduce AutocompleteProviderDelegate

components/omnibox.gypi

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       # GN version: //components/omnibox
       'target_name': 'omnibox',
       'type': 'static_library',
@@ skipping 16 matching lines @@
       'sources': [
         # Note: sources list duplicated in GN build.
         'omnibox/autocomplete_input.cc',
         'omnibox/autocomplete_input.h',
         'omnibox/autocomplete_match.cc',
         'omnibox/autocomplete_match.h',
         'omnibox/autocomplete_match_type.cc',
         'omnibox/autocomplete_match_type.h',
         'omnibox/autocomplete_provider.cc',
         'omnibox/autocomplete_provider.h',
+        'omnibox/autocomplete_provider_delegate.h',
         'omnibox/autocomplete_provider_listener.h',
         'omnibox/autocomplete_result.cc',
         'omnibox/autocomplete_result.h',
         'omnibox/autocomplete_scheme_classifier.h',
         'omnibox/keyword_extensions_delegate.cc',
         'omnibox/keyword_extensions_delegate.h',
         'omnibox/keyword_provider.cc',
         'omnibox/keyword_provider.h',
         'omnibox/omnibox_field_trial.cc',
         'omnibox/omnibox_field_trial.h',
@@ skipping 18 matching lines @@
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
         'omnibox/test_scheme_classifier.cc',
         'omnibox/test_scheme_classifier.h',
       ],
     },
   ],
 }