FileManager: fix typo: UMOUNTED -> UNMOUNTED

An enum named "VolumeManager.GDataStatus" doesn't have "UMOUNTED" but "UNMOUNTED".

R=kaznacheev@chromium.org
BUG=none

Review URL: https://chromiumcodereview.appspot.com/10963023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@158205 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/js/volume_manager.js

@@ -203,7 +203,7 @@ VolumeManager.prototype.onMountCompleted_ = function(event) {
         this.waitGDataLoaded_(event.mountPath,
             this.setGDataStatus_.bind(this, VolumeManager.GDataStatus.MOUNTED));
       } else if (event.eventType == 'unmount') {
-        this.setGDataStatus_(VolumeManager.GDataStatus.UMOUNTED);
+        this.setGDataStatus_(VolumeManager.GDataStatus.UNMOUNTED);
       }
     }
   }