[SyncFS] Add TaskLogger and wire up it.

chrome/browser/sync_file_system/drive_backend/sync_worker.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 "chrome/browser/sync_file_system/drive_backend/sync_worker.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 299 matching lines @@
     bool used_network) {
   UpdateServiceStateFromSyncStatusCode(status, used_network);
 
   if (GetMetadataDatabase()) {
     FOR_EACH_OBSERVER(
         Observer, observers_,
         OnPendingFileListUpdated(GetMetadataDatabase()->CountDirtyTracker()));
   }
 }
 
+void SyncWorker::RecordTaskLog(scoped_ptr<TaskLogger::TaskLog> task_log) {
+  context_->GetUITaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&TaskLogger::RecordLog,
+                 context_->GetTaskLogger(),
+                 base::Passed(&task_log)));
+}
+
 void SyncWorker::OnNotificationReceived() {
   if (service_state_ == REMOTE_SERVICE_TEMPORARY_UNAVAILABLE)
     UpdateServiceState(REMOTE_SERVICE_OK, "Got push notification for Drive.");
 
   should_check_remote_change_ = true;
   MaybeScheduleNextTask();
 }
 
 void SyncWorker::OnReadyToSendRequests(const std::string& account_id) {
   if (service_state_ == REMOTE_SERVICE_OK)
@@ skipping 375 matching lines @@
             "Service state changed: %d->%d: %s",
             old_state, GetCurrentState(), description.c_str());
 
   FOR_EACH_OBSERVER(
       Observer, observers_,
       UpdateServiceState(GetCurrentState(), description));
 }
 
 }  // namespace drive_backend
 }  // namespace sync_file_system