[Sync] Allow sync start without sign-in if the local sync backend is on.

components/browser_sync/profile_sync_service_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/browser_sync/profile_sync_service.h"
 
 #include <utility>
 
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 193 matching lines @@
         &profile_sync_service_bundle_);
     ProfileSyncService::InitParams init_params =
         profile_sync_service_bundle_.CreateBasicInitParams(behavior,
                                                            builder.Build());
 
     service_ = base::MakeUnique<ProfileSyncService>(std::move(init_params));
     service_->RegisterDataTypeController(
         base::MakeUnique<syncer::FakeDataTypeController>(syncer::BOOKMARKS));
   }
 
-#if defined(OS_WIN) || defined(OS_MACOSX) || \
-    (defined(OS_LINUX) && !defined(OS_CHROMEOS))
-  void CreateServiceWithoutSignIn() {
-    CreateService(ProfileSyncService::AUTO_START);
-    signin_manager()->SignOut(signin_metrics::SIGNOUT_TEST,
-                              signin_metrics::SignoutDelete::IGNORE_METRIC);
+  void CreateServiceWithLocalSyncBackend() {
+    component_factory_ = profile_sync_service_bundle_.component_factory();
+    ProfileSyncServiceBundle::SyncClientBuilder builder(
+        &profile_sync_service_bundle_);
+    ProfileSyncService::InitParams init_params =
+        profile_sync_service_bundle_.CreateBasicInitParams(
+            ProfileSyncService::AUTO_START, builder.Build());
+
+    prefs()->SetBoolean(syncer::prefs::kEnableLocalSyncBackend, true);
+    init_params.local_sync_backend_folder =
+        base::FilePath(FILE_PATH_LITERAL("dummyPath"));
+    init_params.oauth2_token_service = nullptr;
+    init_params.gaia_cookie_manager_service = nullptr;
+
+    service_ = base::MakeUnique<ProfileSyncService>(std::move(init_params));
+    service_->RegisterDataTypeController(
+        base::MakeUnique<syncer::FakeDataTypeController>(syncer::BOOKMARKS));
   }
-#endif
 
   void ShutdownAndDeleteService() {
     if (service_)
       service_->Shutdown();
     service_.reset();
   }
 
   void InitializeForNthSync() {
     // Set first sync time before initialize to simulate a complete sync setup.
     syncer::SyncPrefs sync_prefs(prefs());
@@ skipping 133 matching lines @@
                           new base::FundamentalValue(false));
   IssueTestTokens();
   CreateService(ProfileSyncService::AUTO_START);
   ExpectDataTypeManagerCreation(1, GetDefaultConfigureCalledCallback());
   ExpectSyncEngineCreation(1);
   InitializeForNthSync();
   EXPECT_FALSE(service()->IsManaged());
   EXPECT_TRUE(service()->IsSyncActive());
 }
 
+// Verify a successful initialization.
+TEST_F(ProfileSyncServiceTest, SuccessfulLocalBackendInitialization) {
+  prefs()->SetManagedPref(syncer::prefs::kSyncManaged,
+                          new base::FundamentalValue(false));
+  IssueTestTokens();
+  CreateServiceWithLocalSyncBackend();
+  ExpectDataTypeManagerCreation(1, GetDefaultConfigureCalledCallback());
+  ExpectSyncEngineCreation(1);
+  InitializeForNthSync();
+  EXPECT_FALSE(service()->IsManaged());
+  EXPECT_TRUE(service()->IsSyncActive());
+}
+
 // Verify that an initialization where first setup is not complete does not
 // start up the backend.
 TEST_F(ProfileSyncServiceTest, NeedsConfirmation) {
   prefs()->SetManagedPref(syncer::prefs::kSyncManaged,
                           new base::FundamentalValue(false));
   IssueTestTokens();
   CreateService(ProfileSyncService::MANUAL_START);
   syncer::SyncPrefs sync_prefs(prefs());
   base::Time now = base::Time::Now();
   sync_prefs.SetLastSyncedTime(now);
@@ skipping 547 matching lines @@
   // Progress the controller to RUNNING first, which is how the service
   // determines whether a type is enabled.
   controller->StartAssociating(base::Bind(&DoNothing));
   controller->FinishStart(DataTypeController::OK_FIRST_RUN);
   service()->RegisterDataTypeController(std::move(controller));
   EXPECT_NE(nullptr, service()->GetOpenTabsUIDelegate());
 }
 
 }  // namespace
 }  // namespace browser_sync