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

components/previews/core/previews_black_list_unittest.cc

Index: components/previews/core/previews_black_list_unittest.cc
diff --git a/components/previews/core/previews_black_list_unittest.cc b/components/previews/core/previews_black_list_unittest.cc
index d9fd376183c263b64f159a2df011c60cb69283f5..a0864dab466ec3f0a90917664832a215d45692e9 100644
--- a/components/previews/core/previews_black_list_unittest.cc
+++ b/components/previews/core/previews_black_list_unittest.cc
@@ -75,20 +75,21 @@ TEST_F(PreviewsBlackListTest, BlackListNoStore) {
   params["black_list_duration_in_days"] = base::IntToString(duration_in_days);
   ASSERT_TRUE(
       variations::AssociateVariationParams("ClientSidePreviews", "Enabled",
                                            params) &&
       base::FieldTrialList::CreateFieldTrial("ClientSidePreviews", "Enabled"));
 
   base::Clock* test_clock = new base::SimpleTestClock();
 
   std::unique_ptr<PreviewsBlackList> black_list(
       new PreviewsBlackList(nullptr, base::WrapUnique(test_clock)));
+  black_list->Initialize();
 
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_a, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_b, PreviewsType::OFFLINE));
 
   black_list->AddPreviewNavigation(url_a, true, PreviewsType::OFFLINE);
   black_list->AddPreviewNavigation(url_a, true, PreviewsType::OFFLINE);
 
   EXPECT_FALSE(black_list->IsLoadedAndAllowed(url_a, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_b, PreviewsType::OFFLINE));
 
@@ -126,20 +127,21 @@ TEST_F(PreviewsBlackListTest, BlackListWithStore) {
                                            params) &&
       base::FieldTrialList::CreateFieldTrial("ClientSidePreviews", "Enabled"));
 
   base::MessageLoop loop;
 
   base::Clock* test_clock = new base::SimpleTestClock();
 
   std::unique_ptr<PreviewsBlackList> black_list(
       new PreviewsBlackList(base::MakeUnique<TestPreviewsOptOutStore>(),
                             base::WrapUnique(test_clock)));
+  black_list->Initialize();
 
   EXPECT_FALSE(black_list->IsLoadedAndAllowed(url_a1, PreviewsType::OFFLINE));
   EXPECT_FALSE(black_list->IsLoadedAndAllowed(url_a2, PreviewsType::OFFLINE));
   EXPECT_FALSE(black_list->IsLoadedAndAllowed(url_b, PreviewsType::OFFLINE));
 
   base::RunLoop().RunUntilIdle();
 
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_a1, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_a2, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_b, PreviewsType::OFFLINE));
@@ -185,20 +187,21 @@ TEST_F(PreviewsBlackListTest, QueueBehavior) {
   base::MessageLoop loop;
 
   std::vector<bool> test_opt_out{true, false};
 
   for (auto opt_out : test_opt_out) {
     base::Clock* test_clock = new base::SimpleTestClock();
 
     std::unique_ptr<PreviewsBlackList> black_list(
         new PreviewsBlackList(base::MakeUnique<TestPreviewsOptOutStore>(),
                               base::WrapUnique(test_clock)));
+    black_list->Initialize();
 
     EXPECT_FALSE(black_list->IsLoadedAndAllowed(url, PreviewsType::OFFLINE));
     black_list->AddPreviewNavigation(url, opt_out, PreviewsType::OFFLINE);
     black_list->AddPreviewNavigation(url, opt_out, PreviewsType::OFFLINE);
     EXPECT_FALSE(black_list->IsLoadedAndAllowed(url, PreviewsType::OFFLINE));
     base::RunLoop().RunUntilIdle();
     EXPECT_EQ(!opt_out,
               black_list->IsLoadedAndAllowed(url, PreviewsType::OFFLINE));
   }
 
@@ -229,20 +232,21 @@ TEST_F(PreviewsBlackListTest, MaxHosts) {
       variations::AssociateVariationParams("ClientSidePreviews", "Enabled",
                                            params) &&
       base::FieldTrialList::CreateFieldTrial("ClientSidePreviews", "Enabled"));
 
   base::MessageLoop loop;
 
   base::SimpleTestClock* test_clock = new base::SimpleTestClock();
 
   std::unique_ptr<PreviewsBlackList> black_list(
       new PreviewsBlackList(nullptr, base::WrapUnique(test_clock)));
+  black_list->Initialize();
 
   black_list->AddPreviewNavigation(url_a, true, PreviewsType::OFFLINE);
   test_clock->Advance(base::TimeDelta::FromSeconds(1));
   black_list->AddPreviewNavigation(url_b, false, PreviewsType::OFFLINE);
   test_clock->Advance(base::TimeDelta::FromSeconds(1));
   black_list->AddPreviewNavigation(url_c, false, PreviewsType::OFFLINE);
   // url_a should stay in the map, since it has an opt out time.
   EXPECT_FALSE(black_list->IsLoadedAndAllowed(url_a, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_b, PreviewsType::OFFLINE));
   EXPECT_TRUE(black_list->IsLoadedAndAllowed(url_c, PreviewsType::OFFLINE));