Enrich fileBrowserPrivate.onFileTransfersUpdated event to support displaying total number of jobs.

chrome/browser/chromeos/extensions/file_manager/event_router.h

Index: chrome/browser/chromeos/extensions/file_manager/event_router.h
diff --git a/chrome/browser/chromeos/extensions/file_manager/event_router.h b/chrome/browser/chromeos/extensions/file_manager/event_router.h
index 42e65b60b5f4865cdf63fe543ebc6ae7bf0b849f..bfcf4c9831b47eeb8c38ed7ba17b6d5fa6172c3d 100644
--- a/chrome/browser/chromeos/extensions/file_manager/event_router.h
+++ b/chrome/browser/chromeos/extensions/file_manager/event_router.h
@@ -182,11 +182,6 @@ class EventRouter
   void ShowRemovableDeviceInFileManager(VolumeType type,
                                         const base::FilePath& mount_path);
 
-  // Sends onFileTranferUpdated to extensions if needed. If |always| is true,
-  // it sends the event always. Otherwise, it sends the event if enough time has
-  // passed from the previous event so as not to make extension busy.
-  void SendDriveFileTransferEvent(bool always);
-
   // Manages the list of currently active Drive file transfer jobs.
   struct DriveJobInfoWithStatus {
     DriveJobInfoWithStatus();
@@ -195,9 +190,23 @@ class EventRouter
     drive::JobInfo job_info;
     std::string status;
   };
+
+  // Sends onFileTranferUpdated to extensions if needed. The request is send
+  // after enough time has passed from the previous event if should_delay is
+  // true. call_time is used to refresh sending event.
+  void SendDriveFileTransferEvent(
+      const DriveJobInfoWithStatus& job_info_with_status,
+      base::Time call_time,
+      bool should_delay);
+
   std::map<drive::JobID, DriveJobInfoWithStatus> drive_jobs_;
   base::Time last_file_transfer_event_;
   base::Time last_copy_progress_event_;
+  base::Time last_post_delayed_task_;
+  base::Time first_delay_task_;
+
+  const base::TimeDelta delay_time_;
+  const base::TimeDelta force_send_time_;
 
   WatcherMap file_watchers_;
   scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;