Snippets are enabled when search suggestions are enabled.

components/ntp_snippets/ntp_snippets_service.h

Index: components/ntp_snippets/ntp_snippets_service.h
diff --git a/components/ntp_snippets/ntp_snippets_service.h b/components/ntp_snippets/ntp_snippets_service.h
index a5bac53c11f3fe8e0bd2034c6e06dcb037ef7eed..3164a108209c160633d5f6c779e78dc8cfba0c99 100644
--- a/components/ntp_snippets/ntp_snippets_service.h
+++ b/components/ntp_snippets/ntp_snippets_service.h
@@ -64,6 +64,7 @@ class NTPSnippetsService : public KeyedService,
   // the locale, so 'en_US' (English language with US locale) and 'en-GB_US'
   // (British English person in the US) are not language codes.
   NTPSnippetsService(
+      bool enabled,
       PrefService* pref_service,
       sync_driver::SyncService* sync_service,
       suggestions::SuggestionsService* suggestions_service,
@@ -76,8 +77,6 @@ class NTPSnippetsService : public KeyedService,
 
   static void RegisterProfilePrefs(PrefRegistrySimple* registry);
 
-  void Init(bool enabled);
-
   // Inherited from KeyedService.
   void Shutdown() override;
 
@@ -162,12 +161,12 @@ class NTPSnippetsService : public KeyedService,
   // initializing and the sync state is not known.
   bool IsSyncStateIncompatible();
 
-  enum class State {

[dgn, 2016/05/24 16:38:35]

treib@ is adding a LOADED state, and I'm adding a DISABLED one. I don't think
this should be removed.

[Marc Treib, 2016/05/24 16:55:24]

+1 :)

[Michael van Ouwerkerk, 2016/05/24 16:58:09]

Done.

-    NOT_INITED,
-    INITED,
-    SHUT_DOWN
-  } state_;
+  // Whether Shutdown has been called.
+  bool shutdown_;
 
+  // When |enabled_| is true the service will fetch snippets from the server
+  // using |snippets_fetcher_|, load snippets from device storage, and schedule
+  // the |scheduler_|.
   bool enabled_;
 
   PrefService* pref_service_;