Moving previews code from components/ to chrome/

components/previews/core/previews_ui_service.h

Index: components/previews/core/previews_ui_service.h
diff --git a/components/previews/core/previews_ui_service.h b/components/previews/core/previews_ui_service.h
index 12452bcacbec17f23895ac19047030de39f9668a..85dc8d12dd6335145b02631711807a5e7986a457 100644
--- a/components/previews/core/previews_ui_service.h
+++ b/components/previews/core/previews_ui_service.h
@@ -13,6 +13,7 @@
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "components/previews/core/previews_experiments.h"
+#include "components/previews/core/previews_io_data.h"
 #include "components/previews/core/previews_opt_out_store.h"
 
 class GURL;
@@ -31,7 +32,8 @@ class PreviewsUIService {
   PreviewsUIService(
       PreviewsIOData* previews_io_data,
       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
-      std::unique_ptr<PreviewsOptOutStore> previews_opt_out_store);
+      std::unique_ptr<PreviewsOptOutStore> previews_opt_out_store,
+      const PreviewsIsEnabledCallback& is_enabled_callback);
   virtual ~PreviewsUIService();
 
   // Sets |io_data_| to |io_data| to allow calls from the UI thread to the IO