[SyncFS] Add TaskLogger and wire up it.

chrome/browser/sync_file_system/drive_backend/sync_engine.cc

Index: chrome/browser/sync_file_system/drive_backend/sync_engine.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
index be3a51a18477c1f3ae973dd9d3b7ed15d643fffe..fecf2c3a6079e45257519fe50f6d9c236f5ae7ab 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
+++ b/chrome/browser/sync_file_system/drive_backend/sync_engine.cc
@@ -134,7 +134,8 @@ void DidRegisterOrigin(const base::TimeTicks& start_time,
 }  // namespace
 
 scoped_ptr<SyncEngine> SyncEngine::CreateForBrowserContext(
-    content::BrowserContext* context) {
+    content::BrowserContext* context,
+    TaskLogger* task_logger) {
   scoped_refptr<base::SequencedWorkerPool> worker_pool(
       content::BrowserThread::GetBlockingPool());
   scoped_refptr<base::SequencedTaskRunner> drive_task_runner(
@@ -184,6 +185,7 @@ scoped_ptr<SyncEngine> SyncEngine::CreateForBrowserContext(
                      extension_service,
                      signin_manager));
   sync_engine->Initialize(GetSyncFileSystemDir(context->GetPath()),
+                          task_logger,
                           file_task_runner.get(),
                           NULL);
 
@@ -209,27 +211,26 @@ SyncEngine::~SyncEngine() {
 }
 
 void SyncEngine::Initialize(const base::FilePath& base_dir,
+                            TaskLogger* task_logger,
                             base::SequencedTaskRunner* file_task_runner,
                             leveldb::Env* env_override) {
   // DriveServiceWrapper and DriveServiceOnWorker relay communications
   // between DriveService and syncers in SyncWorker.
-  scoped_ptr<drive::DriveServiceInterface>
-      drive_service_on_worker(
-          new DriveServiceOnWorker(drive_service_wrapper_->AsWeakPtr(),
-                                   base::MessageLoopProxy::current(),
-                                   worker_task_runner_));
-  scoped_ptr<drive::DriveUploaderInterface>
-      drive_uploader_on_worker(
-          new DriveUploaderOnWorker(drive_uploader_wrapper_->AsWeakPtr(),
-                                    base::MessageLoopProxy::current(),
-                                    worker_task_runner_));
-  scoped_ptr<SyncEngineContext>
-      sync_engine_context(
-          new SyncEngineContext(drive_service_on_worker.Pass(),
-                                drive_uploader_on_worker.Pass(),
+  scoped_ptr<drive::DriveServiceInterface> drive_service_on_worker(
+      new DriveServiceOnWorker(drive_service_wrapper_->AsWeakPtr(),
+                               base::MessageLoopProxy::current(),
+                               worker_task_runner_));
+  scoped_ptr<drive::DriveUploaderInterface> drive_uploader_on_worker(
+      new DriveUploaderOnWorker(drive_uploader_wrapper_->AsWeakPtr(),
                                 base::MessageLoopProxy::current(),
-                                worker_task_runner_,
-                                file_task_runner));
+                                worker_task_runner_));
+  scoped_ptr<SyncEngineContext> sync_engine_context(
+      new SyncEngineContext(drive_service_on_worker.Pass(),
+                            drive_uploader_on_worker.Pass(),
+                            task_logger,
+                            base::MessageLoopProxy::current(),
+                            worker_task_runner_,
+                            file_task_runner));
 
   worker_observer_.reset(
       new WorkerObserver(base::MessageLoopProxy::current(),