[Content suggestions] Add a feature to fetch favicons from a new server

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 "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/time/clock.h"
 #include "components/ntp_snippets/category_rankers/click_based_category_ranker.h"
@@ skipping 25 matching lines @@
 
 const base::Feature kForeignSessionsSuggestionsFeature{
     "NTPForeignSessionsSuggestions", base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kPreferAmpUrlsFeature{"NTPPreferAmpUrls",
                                           base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kCategoryRanker{"ContentSuggestionsCategoryRanker",
                                     base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kPublisherFaviconsFromNewServerFeature{
+    "ContentSuggestionsFaviconsFromNewServer",
+    base::FEATURE_DISABLED_BY_DEFAULT};
+
 const char kCategoryRankerParameter[] = "category_ranker";
 const char kCategoryRankerConstantRanker[] = "constant";
 const char kCategoryRankerClickBasedRanker[] = "click_based";
 
 CategoryRankerChoice GetSelectedCategoryRanker() {
   std::string category_ranker_value =
       variations::GetVariationParamValueByFeature(kCategoryRanker,
                                                   kCategoryRankerParameter);
 
   if (category_ranker_value.empty()) {
@@ skipping 53 matching lines @@
   if (category_order_value == kCategoryOrderEmergingMarketsOriented) {
     return CategoryOrderChoice::EMERGING_MARKETS_ORIENTED;
   }
 
   LOG(DFATAL) << "The " << kCategoryOrderParameter << " parameter value is '"
               << category_order_value << "'";
   return CategoryOrderChoice::GENERAL;
 }
 
 }  // namespace ntp_snippets