[SyncFS] Add TaskLogger and wire up it.

chrome/browser/sync_file_system/drive_backend/sync_task_manager.h

Index: chrome/browser/sync_file_system/drive_backend/sync_task_manager.h
diff --git a/chrome/browser/sync_file_system/drive_backend/sync_task_manager.h b/chrome/browser/sync_file_system/drive_backend/sync_task_manager.h
index 0597b114bfa85446e1f3be0722c0ab9508781dd4..87e418abab4001f2ec5abe5cc275955c21a719ef 100644
--- a/chrome/browser/sync_file_system/drive_backend/sync_task_manager.h
+++ b/chrome/browser/sync_file_system/drive_backend/sync_task_manager.h
@@ -19,6 +19,7 @@
 #include "chrome/browser/sync_file_system/drive_backend/task_dependency_manager.h"
 #include "chrome/browser/sync_file_system/sync_callbacks.h"
 #include "chrome/browser/sync_file_system/sync_status_code.h"
+#include "chrome/browser/sync_file_system/task_logger.h"
 
 namespace tracked_objects {
 class Location;
@@ -61,6 +62,8 @@ class SyncTaskManager
     virtual void NotifyLastOperationStatus(
         SyncStatusCode last_operation_status,
         bool last_operation_used_network) = 0;
+
+    virtual void RecordTaskLog(scoped_ptr<TaskLogger::TaskLog> task_log) = 0;
   };
 
   // Runs at most |maximum_background_tasks| parallel as background tasks.