Fixed a bug that the list still shows deleted directory.

ui/file_manager/file_manager/foreground/js/file_watcher.js

Index: ui/file_manager/file_manager/foreground/js/file_watcher.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_watcher.js b/ui/file_manager/file_manager/foreground/js/file_watcher.js
index d55af870451958df1160b7322d8229d37271c737..9db0971aeeb2d7783b63595387d00912deb5e84e 100644
--- a/ui/file_manager/file_manager/foreground/js/file_watcher.js
+++ b/ui/file_manager/file_manager/foreground/js/file_watcher.js
@@ -47,11 +47,30 @@ FileWatcher.prototype.dispose = function() {
  * @private
  */
 FileWatcher.prototype.onDirectoryChanged_ = function(event) {
-  if (this.watchedDirectoryEntry_ &&
-      event.entry.toURL() === this.watchedDirectoryEntry_.toURL()) {
+  var fireWatcherDirectoryChanged = function(changedFiles) {
     var e = new Event('watcher-directory-changed');
-    e.changedFiles = event.changedFiles;
+
+    if (changedFiles)
+      e.changedFiles = changedFiles;
+
     this.dispatchEvent(e);
+  }.bind(this);
+
+  if (this.watchedDirectoryEntry_) {
+    var eventURL = event.entry.toURL();
+    var watchedDirURL = this.watchedDirectoryEntry_.toURL();
+
+    if (eventURL === watchedDirURL) {
+      fireWatcherDirectoryChanged(event.changedFiles);
+    } else if (watchedDirURL.match(new RegExp('^' + eventURL))) {
+      // When watched directory is deleted by the change in parent directory,
+      // notify it as watcher directory changed.
+      this.watchedDirectoryEntry_.getDirectory(
+          this.watchedDirectoryEntry_.fullPath,
+          {create: false},
+          null,
+          function() { fireWatcherDirectoryChanged(null); });
+    }
   }
 };