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

components/ntp_snippets/features.cc

Index: components/ntp_snippets/features.cc
diff --git a/components/ntp_snippets/features.cc b/components/ntp_snippets/features.cc
index 89a6f085e71e9fb4ff3782859256bb9877ee1f52..13aaefaf1ac0b22fef453c20f8e33ecdc615f074 100644
--- a/components/ntp_snippets/features.cc
+++ b/components/ntp_snippets/features.cc
@@ -43,6 +43,10 @@ const base::Feature kPreferAmpUrlsFeature{"NTPPreferAmpUrls",
 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";