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

chrome/browser/previews/previews_service.cc

 // Copyright 2016 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.
 
 #include "chrome/browser/previews/previews_service.h"
 
+#include "base/files/file_path.h"
+#include "base/memory/ptr_util.h"
+#include "base/sequenced_task_runner.h"
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/common/chrome_constants.h"
+#include "components/previews/core/previews_io_data.h"
+#include "components/previews/core/previews_opt_out_store.h"
+#include "components/previews/core/previews_opt_out_store_sql.h"
 #include "components/previews/core/previews_ui_service.h"
 #include "content/public/browser/browser_thread.h"
 
 PreviewsService::PreviewsService() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 }
 
 PreviewsService::~PreviewsService() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 }
 
-void PreviewsService::set_previews_ui_service(
-    std::unique_ptr<previews::PreviewsUIService> previews_ui_service) {
+void PreviewsService::Initialize(
+    previews::PreviewsIOData* previews_io_data,
+    const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
+    const base::FilePath& profile_path) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  previews_ui_service_ = std::move(previews_ui_service);
+
+  // Get the background thread to run SQLite on.
+  scoped_refptr<base::SequencedTaskRunner> background_task_runner =
+      content::BrowserThread::GetBlockingPool()->GetSequencedTaskRunner(
+          content::BrowserThread::GetBlockingPool()->GetSequenceToken());
+
+  previews_ui_service_ = base::MakeUnique<previews::PreviewsUIService>(
+      previews_io_data, io_task_runner,
+      base::MakeUnique<previews::PreviewsOptOutStoreSQL>(
+          io_task_runner, background_task_runner,
+          profile_path.Append(chrome::kPreviewsOptOutDBFilename)));
 }