[SyncFS] Add TaskLogger and wire up it.

chrome/browser/sync_file_system/sync_file_system_service.h

Index: chrome/browser/sync_file_system/sync_file_system_service.h
diff --git a/chrome/browser/sync_file_system/sync_file_system_service.h b/chrome/browser/sync_file_system/sync_file_system_service.h
index c4e5890e1ec418025ed0ffa07e9f39a7ecdde985..69891872827d28d9c0d0c10e981b648ddebf6b48 100644
--- a/chrome/browser/sync_file_system/sync_file_system_service.h
+++ b/chrome/browser/sync_file_system/sync_file_system_service.h
@@ -21,6 +21,7 @@
 #include "chrome/browser/sync_file_system/remote_file_sync_service.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 #include "chrome/browser/sync_file_system/sync_service_state.h"
+#include "chrome/browser/sync_file_system/task_logger.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -73,14 +74,12 @@ class SyncFileSystemService
   void AddSyncEventObserver(SyncEventObserver* observer);
   void RemoveSyncEventObserver(SyncEventObserver* observer);
 
-  ConflictResolutionPolicy GetConflictResolutionPolicy(const GURL& origin);
-  SyncStatusCode SetConflictResolutionPolicy(const GURL& origin,
-                                             ConflictResolutionPolicy policy);
-
   LocalChangeProcessor* GetLocalChangeProcessor(const GURL& origin);
 
   void OnSyncIdle();
 
+  TaskLogger* task_logger() { return &task_logger_; }
+
  private:
   friend class SyncFileSystemServiceFactory;
   friend class SyncFileSystemServiceTest;
@@ -187,6 +186,7 @@ class SyncFileSystemService
   // Indicates if sync is currently enabled or not.
   bool sync_enabled_;
 
+  TaskLogger task_logger_;
   ObserverList<SyncEventObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncFileSystemService);