Adding a SQL implementation of the backing store for previews opt outs

components/previews/core/previews_io_data.cc

Index: components/previews/core/previews_io_data.cc
diff --git a/components/previews/core/previews_io_data.cc b/components/previews/core/previews_io_data.cc
index 02f4b333e9af00ae7f3f0ef3364564d0876ca37b..b7661fba7c4dac1d36be723b2da8298b246727c4 100644
--- a/components/previews/core/previews_io_data.cc
+++ b/components/previews/core/previews_io_data.cc
@@ -25,29 +25,30 @@ PreviewsIOData::PreviewsIOData(
       weak_factory_(this) {}
 
 PreviewsIOData::~PreviewsIOData() {}
 
 void PreviewsIOData::Initialize(
     base::WeakPtr<PreviewsUIService> previews_ui_service,
     std::unique_ptr<PreviewsOptOutStore> previews_opt_out_store) {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
   previews_ui_service_ = previews_ui_service;
 
+  previews_black_list_.reset(
+      new PreviewsBlackList(std::move(previews_opt_out_store),
+                            base::MakeUnique<base::DefaultClock>()));
+
   // Set up the IO thread portion of |this|.
-  io_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(&PreviewsIOData::InitializeOnIOThread, base::Unretained(this),
-                 base::Passed(&previews_opt_out_store)));
+  io_task_runner_->PostTask(FROM_HERE,
+                            base::Bind(&PreviewsIOData::InitializeOnIOThread,
+                                       base::Unretained(this)));
 }
 
-void PreviewsIOData::InitializeOnIOThread(
-    std::unique_ptr<PreviewsOptOutStore> previews_opt_out_store) {
+void PreviewsIOData::InitializeOnIOThread() {
   DCHECK(io_task_runner_->BelongsToCurrentThread());
-  previews_black_list_.reset(
-      new PreviewsBlackList(std::move(previews_opt_out_store),
-                            base::MakeUnique<base::DefaultClock>()));
+  previews_black_list_->Initialize();
+
   ui_task_runner_->PostTask(
       FROM_HERE, base::Bind(&PreviewsUIService::SetIOData, previews_ui_service_,
                             weak_factory_.GetWeakPtr()));
 }
 
 }  // namespace previews