arc: Add package app list updated event.

chrome/browser/ui/app_list/arc/arc_app_unittest.cc

Index: chrome/browser/ui/app_list/arc/arc_app_unittest.cc
diff --git a/chrome/browser/ui/app_list/arc/arc_app_unittest.cc b/chrome/browser/ui/app_list/arc/arc_app_unittest.cc
index 4ef89ee76a81f71aff1b3388b7fc5c747262b2ac..6279c2914269f9e3e5b581f767a575810160ac23 100644
--- a/chrome/browser/ui/app_list/arc/arc_app_unittest.cc
+++ b/chrome/browser/ui/app_list/arc/arc_app_unittest.cc
@@ -911,3 +911,36 @@ TEST_F(ArcAppModelBuilderTest, AppLauncher) {
   ASSERT_EQ(2u, app_instance()->launch_requests().size());
   EXPECT_TRUE(app_instance()->launch_requests()[1]->IsForApp(app2));
 }
+
+TEST_F(ArcAppModelBuilderTest, ArcAppsOnPackageUpdated) {
+  ArcAppListPrefs* prefs = ArcAppListPrefs::Get(profile_.get());
+  ASSERT_NE(nullptr, prefs);
+
+  std::vector<arc::mojom::AppInfo> apps = fake_apps();
+  ASSERT_GE(3u, apps.size());
+  apps[0].package_name = apps[2].package_name;
+  apps[1].package_name = apps[2].package_name;
+  // Second app should be preserved after update.
+  std::vector<arc::mojom::AppInfo> apps1(apps.begin(), apps.begin() + 2);
+  std::vector<arc::mojom::AppInfo> apps2(apps.begin() + 1, apps.begin() + 3);
+
+  app_instance()->RefreshAppList();
+  app_instance()->SendRefreshAppList(apps1);
+  ValidateHaveApps(apps1);
+
+  const std::string app_id = ArcAppTest::GetAppId(apps[1]);
+  const base::Time now_time = base::Time::Now();
+  prefs->SetLastLaunchTime(app_id, now_time);
+  std::unique_ptr<ArcAppListPrefs::AppInfo> app_info_before =
+      prefs->GetApp(app_id);
+  ASSERT_TRUE(app_info_before);
+  EXPECT_EQ(now_time, app_info_before->last_launch_time);
+
+  app_instance()->SendPackageAppListRefreshed(apps[0].package_name, apps2);
+  ValidateHaveApps(apps2);
+
+  std::unique_ptr<ArcAppListPrefs::AppInfo> app_info_after =
+      prefs->GetApp(app_id);
+  ASSERT_TRUE(app_info_after);
+  EXPECT_EQ(now_time, app_info_after->last_launch_time);
+}