Dispatch change events when file changes have happened on Drive.

ui/file_manager/file_manager/foreground/js/ui/file_table.js

Index: ui/file_manager/file_manager/foreground/js/ui/file_table.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/file_table.js b/ui/file_manager/file_manager/foreground/js/ui/file_table.js
index 7d62b53bb11136a65ffa37ee0587f40689b9459d..57b7f050a7d169628c6b022431340c6846ce5a63 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/file_table.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/file_table.js
@@ -494,9 +494,12 @@ FileTable.prototype.shouldStartDragSelection_ = function(event) {
     return true;
 
   // Check if the point is on the column contents or not.
-  var item = this.list.getListItemByIndex(itemIndex);
   switch (this.columnModel.columns_[hitColumn.index].id) {
     case 'name':
+      var item = this.list.getListItemByIndex(itemIndex);

[yawano, 2015/03/03 03:15:54]

While it's difficult to make this item variable null with human operation, this
can be null theoretically. I added null check for this.

+      if (!item)
+        return false;
+
       var spanElement = item.querySelector('.filename-label span');
       var spanRect = spanElement.getBoundingClientRect();
       // The this.list.cachedBounds_ object is set by