Ntp: use AMP urls for content suggestions when available.

components/ntp_snippets/features.cc

 // Copyright 2016 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 "components/ntp_snippets/features.h"
 
 #include "components/variations/variations_associated_data.h"
 
 namespace ntp_snippets {
 
@@ skipping 23 matching lines @@
 
 const base::Feature kSectionDismissalFeature{
     "NTPSuggestionsSectionDismissal", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kForeignSessionsSuggestionsFeature{
     "NTPForeignSessionsSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kFetchMoreFeature{"NTPSuggestionsFetchMore",
                                       base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kPreferAmpUrlsFeature{"NTPPreferAmpUrls",
+                                          base::FEATURE_ENABLED_BY_DEFAULT};
+
 }  // namespace ntp_snippets