Add UMA for the content suggestions settings

components/ntp_snippets/content_suggestions_service.cc

Index: components/ntp_snippets/content_suggestions_service.cc
diff --git a/components/ntp_snippets/content_suggestions_service.cc b/components/ntp_snippets/content_suggestions_service.cc
index f808d74e35c9d830ea6193e2b90aa6d89428402a..90de55176db7fc1c97e7c382516f6f45ad4d2a87 100644
--- a/components/ntp_snippets/content_suggestions_service.cc
+++ b/components/ntp_snippets/content_suggestions_service.cc
@@ -12,6 +12,7 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/default_clock.h"
@@ -49,6 +50,9 @@ ContentSuggestionsService::ContentSuggestionsService(
   }
 
   RestoreDismissedCategoriesFromPrefs();
+
+  UMA_HISTOGRAM_BOOLEAN("ContentSuggestions.Preferences.RemoteSuggestions",
+                        IsRemoteSuggestionsServiceEnabled());
 }
 
 ContentSuggestionsService::~ContentSuggestionsService() = default;