[Sync] Pass a TaskRunner into SBHI/SBHC, not a thread or message loop.

components/browser_sync/abstract_profile_sync_service_test.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/abstract_profile_sync_service_test.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 18 matching lines @@
 
 namespace browser_sync {
 
 namespace {
 
 class SyncBackendHostForProfileSyncTest : public SyncBackendHostImpl {
  public:
   SyncBackendHostForProfileSyncTest(
       const base::FilePath& temp_dir,
       syncer::SyncClient* sync_client,
-      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
       invalidation::InvalidationService* invalidator,
       const base::WeakPtr<syncer::SyncPrefs>& sync_prefs,
       const base::Closure& callback);
   ~SyncBackendHostForProfileSyncTest() override;
 
   void RequestConfigureSyncer(
       syncer::ConfigureReason reason,
       syncer::ModelTypeSet to_download,
       syncer::ModelTypeSet to_purge,
       syncer::ModelTypeSet to_journal,
@@ skipping 12 matching lines @@
   // Allows extra initialization work to be performed before the backend comes
   // up.
   base::Closure callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostForProfileSyncTest);
 };
 
 SyncBackendHostForProfileSyncTest::SyncBackendHostForProfileSyncTest(
     const base::FilePath& temp_dir,
     syncer::SyncClient* sync_client,
-    const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
     invalidation::InvalidationService* invalidator,
     const base::WeakPtr<syncer::SyncPrefs>& sync_prefs,
     const base::Closure& callback)
     : SyncBackendHostImpl(
           "dummy_debug_name",
           sync_client,
-          ui_thread,
           invalidator,
           sync_prefs,
           temp_dir.Append(base::FilePath(FILE_PATH_LITERAL("test")))),
       callback_(callback) {}
 
 SyncBackendHostForProfileSyncTest::~SyncBackendHostForProfileSyncTest() {}
 
 void SyncBackendHostForProfileSyncTest::InitCore(
     std::unique_ptr<syncer::DoInitializeOptions> options) {
   options->http_bridge_factory = base::MakeUnique<TestHttpBridgeFactory>();
@@ skipping 100 matching lines @@
       profile_sync_service_bundle_.CreateBasicInitParams(
           ProfileSyncService::AUTO_START, std::move(sync_client));
   sync_service_ =
       base::MakeUnique<TestProfileSyncService>(std::move(init_params));
 
   syncer::SyncApiComponentFactoryMock* components =
       profile_sync_service_bundle_.component_factory();
   EXPECT_CALL(*components, CreateSyncBackendHost(_, _, _, _))
       .WillOnce(Return(new SyncBackendHostForProfileSyncTest(
           temp_dir_.GetPath(), sync_service_->GetSyncClient(),
-          base::ThreadTaskRunnerHandle::Get(),
           profile_sync_service_bundle_.fake_invalidation_service(),
           sync_service_->sync_prefs()->AsWeakPtr(),
           initialization_success_callback)));
 
   sync_service_->SetFirstSetupComplete();
 }
 
 base::Callback<syncer::SyncService*(void)>
 AbstractProfileSyncServiceTest::GetSyncServiceCallback() {
   return base::Bind(GetSyncService,
@@ skipping 17 matching lines @@
 
 bool CreateRootHelper::success() {
   return success_;
 }
 
 void CreateRootHelper::CreateRootCallback() {
   success_ = test_->CreateRoot(model_type_);
 }
 
 }  // namespace browser_sync