Implement startCopy and cancelCopy.

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 0d4af090104ef2b53725cbf1222ecc6b028f3928..3e5313dc7cb2d7281beb7b46ee0c8f21892c927f 100644
--- a/chrome/browser/chromeos/extensions/file_manager/event_router.h
+++ b/chrome/browser/chromeos/extensions/file_manager/event_router.h
@@ -22,6 +22,10 @@
 class PrefChangeRegistrar;
 class Profile;
 
+namespace base {
+class ListValue;
+}
+
 namespace chromeos {
 class NetworkState;
 }
@@ -66,6 +70,10 @@ class EventRouter
   void RemoveFileWatch(const base::FilePath& local_path,
                        const std::string& extension_id);
 
+  // Called when a copy task is completed.
+  void OnCopyCompleted(
+      int copy_id, const GURL& url, base::PlatformFileError error);
+
   // DiskMountManager::Observer overrides.
   virtual void OnDiskEvent(
       chromeos::disks::DiskMountManager::DiskEvent event,