Enable NTPTilesInInstantService by default

chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc

Index: chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc
diff --git a/chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc b/chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc
index 21a1e42aa2ce1a581354752a6d4c75c7bb32613c..925f9cdfaa44de326673595df2809621303983d4 100644
--- a/chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc
+++ b/chrome/browser/extensions/api/signed_in_devices/signed_in_devices_api_unittest.cc
@@ -156,12 +156,12 @@ std::unique_ptr<KeyedService> CreateProfileSyncServiceMock(
 }
 
 class ExtensionSignedInDevicesTest : public ExtensionApiUnittest {
- public:
-  void SetUp() override {
-    ExtensionApiUnittest::SetUp();
-
-    ProfileSyncServiceFactory::GetInstance()->SetTestingFactory(
-        profile(), CreateProfileSyncServiceMock);
+ private:
+  TestingProfile* CreateProfile() override {
+    TestingProfile::Builder builder;
+    builder.AddTestingFactory(ProfileSyncServiceFactory::GetInstance(),
+                              CreateProfileSyncServiceMock);
+    return builder.Build().release();
   }
 };