Adding ClearBlackList to the PreviewsBlackList and plumbing to UI

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..54b5d0725c0e6c64600462971aa81eadfa030e36 100644
--- a/components/previews/core/previews_io_data.cc
+++ b/components/previews/core/previews_io_data.cc
@@ -7,20 +7,21 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/sequenced_task_runner.h"
 #include "base/time/default_clock.h"
 #include "components/previews/core/previews_black_list.h"
 #include "components/previews/core/previews_opt_out_store.h"
 #include "components/previews/core/previews_ui_service.h"
+#include "url/gurl.h"
 
 namespace previews {
 
 PreviewsIOData::PreviewsIOData(
     const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner,
     const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
     : ui_task_runner_(ui_task_runner),
       io_task_runner_(io_task_runner),
       weak_factory_(this) {}
 
@@ -43,11 +44,24 @@ void PreviewsIOData::InitializeOnIOThread(
     std::unique_ptr<PreviewsOptOutStore> previews_opt_out_store) {
   DCHECK(io_task_runner_->BelongsToCurrentThread());
   previews_black_list_.reset(
       new PreviewsBlackList(std::move(previews_opt_out_store),
                             base::MakeUnique<base::DefaultClock>()));
   ui_task_runner_->PostTask(
       FROM_HERE, base::Bind(&PreviewsUIService::SetIOData, previews_ui_service_,
                             weak_factory_.GetWeakPtr()));
 }
 
+void PreviewsIOData::AddPreviewNavigation(const GURL& url,
+                                          bool opt_out,
+                                          PreviewsType type) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
+  previews_black_list_->AddPreviewNavigation(url, opt_out, type);
+}
+
+void PreviewsIOData::ClearBlackList(base::Time begin_time,
+                                    base::Time end_time) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
+  previews_black_list_->ClearBlackList(begin_time, end_time);
+}
+
 }  // namespace previews