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

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index cdf91c1ecee2a8e1ec194a888901f00b91277410..24ca1fa2afffdf51eccd538e44322ca433f9c059 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2287,6 +2287,13 @@ const char kEnableNtpSnippetsVisibilityDescription[] =
     "If enabled, the NTP snippets will become more discoverable with a "
     "larger portion of the first card above the fold.";
 
+const char kEnableContentSuggestionsNewFaviconServerName[] =
+    "Get favicons for content suggestions from a new server.";
+
+const char kEnableContentSuggestionsNewFaviconServerDescription[] =
+    "If enabled, the content suggestions (on the NTP) will get favicons from a "
+    "new favicon server.";
+
 const char kEnableNtpRemoteSuggestionsName[] =
     "Show server-side suggestions on the New Tab page";