Revert of [SyncFS] Post tasks between SyncEngine and SyncWorker

chrome/browser/sync_file_system/drive_backend/drive_backend_sync_unittest.cc

 // Copyright 2014 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 <algorithm>
 #include <stack>
 
 #include "base/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 54 matching lines @@
     scoped_ptr<drive::FakeDriveService> drive_service(
         new drive::FakeDriveService());
     drive_service->Initialize("test@example.com");
     ASSERT_TRUE(drive_service->LoadResourceListForWapi(
         "gdata/root_feed.json"));
 
     scoped_ptr<drive::DriveUploaderInterface> uploader(
         new drive::DriveUploader(drive_service.get(),
                                  file_task_runner_.get()));
 
-    fake_drive_service_helper_.reset(new FakeDriveServiceHelper(
-        drive_service.get(), uploader.get(),
-        kSyncRootFolderTitle));
-
     remote_sync_service_.reset(new SyncEngine(
         drive_service.PassAs<drive::DriveServiceInterface>(),
         uploader.Pass(),
-        file_task_runner_.get(),
         NULL, NULL, NULL));
     remote_sync_service_->AddServiceObserver(this);
-    remote_sync_service_->Initialize(base_dir_.path(),
-                                     base::MessageLoopProxy::current(),
-                                     in_memory_env_.get());
+    remote_sync_service_->Initialize(
+        base_dir_.path(),
+        file_task_runner_.get(),
+        in_memory_env_.get());
     remote_sync_service_->SetSyncEnabled(true);
 
+    fake_drive_service_helper_.reset(new FakeDriveServiceHelper(
+        fake_drive_service(), drive_uploader(),
+        kSyncRootFolderTitle));
+
     local_sync_service_->SetLocalChangeProcessor(remote_sync_service_.get());
     remote_sync_service_->SetRemoteChangeProcessor(local_sync_service_.get());
   }
 
   virtual void TearDown() OVERRIDE {
     typedef std::map<std::string, CannedSyncableFileSystem*>::iterator iterator;
     for (iterator itr = file_systems_.begin();
          itr != file_systems_.end(); ++itr) {
       itr->second->TearDown();
       delete itr->second;
@@ skipping 357 matching lines @@
 
   size_t CountTracker() {
     return metadata_database()->CountFileTracker();
   }
 
   drive::FakeDriveService* fake_drive_service() {
     return static_cast<drive::FakeDriveService*>(
         remote_sync_service_->GetDriveService());
   }
 
+  drive::DriveUploaderInterface* drive_uploader() {
+    return remote_sync_service_->GetDriveUploader();
+  }
+
   FakeDriveServiceHelper* fake_drive_service_helper() {
     return fake_drive_service_helper_.get();
   }
 
   MetadataDatabase* metadata_database() {
     return remote_sync_service_->GetMetadataDatabase();
   }
 
  private:
   content::TestBrowserThreadBundle thread_bundle_;
@@ skipping 1098 matching lines @@
 
   EXPECT_EQ(1u, CountApp());
   EXPECT_EQ(1u, CountLocalFile(app_id));
 
   EXPECT_EQ(2u, CountMetadata());
   EXPECT_EQ(2u, CountTracker());
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system