Fix DefaultApps unit test

chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
index 85ecb1c2c34b4206f6aaf8480891ea1642216c20..4b35a4d60f4d3cf73b259f3af9fa04bc1b39d8e0 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_controller_unittest.cc
@@ -4083,9 +4083,9 @@ TEST_P(ChromeLauncherControllerOrientationTest, ArcOrientationLock) {
 TEST_P(ChromeLauncherControllerArcDefaultAppsTest, DefaultApps) {
   arc_test_.SetUp(profile());
   InitLauncherController();
-  // TODO(crbug.com/709297): Fix this workaround to prevent a TearDown crash.
-  std::vector<std::unique_ptr<AppIconLoader>> no_loaders;
-  launcher_controller_->SetAppIconLoadersForTest(no_loaders);
+
+  // Prevent safe decoding which requires IPC.
+  ArcAppIcon::DisableSafeDecodingForTesting();
 
   ArcAppListPrefs* const prefs = arc_test_.arc_app_list_prefs();
   EnablePlayStore(false);