[Suggestions Service] Enable Suggestions Service by default

components/suggestions/suggestions_service.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 #define COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 43 matching lines @@
 
   // Class taking ownership of |suggestions_store|, |thumbnail_manager| and
   // |blacklist_store|.
   SuggestionsService(
       net::URLRequestContextGetter* url_request_context,
       scoped_ptr<SuggestionsStore> suggestions_store,
       scoped_ptr<ImageManager> thumbnail_manager,
       scoped_ptr<BlacklistStore> blacklist_store);
   ~SuggestionsService() override;
 
-  // Whether this service is enabled.
-  static bool IsEnabled();
-
   // Whether the user is part of a control group.
   static bool IsControlGroup();
 
   // Request suggestions data, which will be passed to |callback|. |sync_state|
   // will influence the behavior of this function (see SyncState definition).
   //
   // |sync_state| must be specified based on the current state of the system
   // (see suggestions::GetSyncState). Callers should call this function again if
   // sync state changes.
   //
@@ skipping 113 matching lines @@
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<SuggestionsService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SuggestionsService);
 };
 
 }  // namespace suggestions
 
 #endif  // COMPONENTS_SUGGESTIONS_SUGGESTIONS_SERVICE_H_