Pass error code for drive::JobListObserver::OnJobDone().

chrome/browser/chromeos/drive/job_list_interface.h

Index: chrome/browser/chromeos/drive/job_list_interface.h
diff --git a/chrome/browser/chromeos/drive/job_list_interface.h b/chrome/browser/chromeos/drive/job_list_interface.h
index 1d4637e2db93e98321f854ecf7ef971441c4aa25..f953fa6208ce593555d86116ea974aea67eef3d8 100644
--- a/chrome/browser/chromeos/drive/job_list_interface.h
+++ b/chrome/browser/chromeos/drive/job_list_interface.h
@@ -7,6 +7,7 @@
 
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
+#include "chrome/browser/chromeos/drive/drive_file_error.h"
 
 namespace drive {
 
@@ -87,7 +88,10 @@ class JobListObserver {
   virtual void OnJobAdded(const JobInfo& job_info) {}
 
   // Called when a job id finished.
-  virtual void OnJobDone(const JobInfo& job_info) {}
+  // |error| is DRIVE_FILE_OK when the job successfully finished, and a value
+  // telling the reason of failure when the jobs is failed.
+  virtual void OnJobDone(const JobInfo& job_info,
+                         DriveFileError error) {}
 
   // Called when a job status is updated.
   virtual void OnJobUpdated(const JobInfo& job_info) {}