Fix some type check errors in file_manager.

ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js

Index: ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js
diff --git a/ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js b/ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js
index 9f9fce323cf89c0a46ce1f44e260b1ddf00773bc..a1443333d35bac2b3cfc4375156d4c6d22a06df8 100644
--- a/ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js
+++ b/ui/file_manager/file_manager/foreground/js/ui/progress_center_panel.js
@@ -181,10 +181,12 @@ function ProgressCenterPanel(element) {
 
   /**
    * Open view containing multiple progress items.
-   * @type {Element}
+   * @type {!HTMLDivElement}
    * @private
    */
-  this.openView_ = this.element_.querySelector('#progress-center-open-view');
+  this.openView_ = assertInstanceof(
+      queryRequiredElement(this.element_, '#progress-center-open-view'),
+      HTMLDivElement);
 
   /**
    * Close view that is a summarized progress item.
@@ -310,7 +312,7 @@ ProgressCenterPanel.prototype.updateItem = function(item) {
   if (newItem) {
     if (!itemElement) {
       itemElement = new ProgressCenterItemElement(this.element_.ownerDocument);
-      this.openView_.insertBefore(itemElement, this.openView_.firstNode);
+      this.openView_.insertBefore(itemElement, this.openView_.firstChild);

[hirono, 2014/10/24 06:45:56]

Could you keep this as it is?
This is typo, but the behavior is correct (we should pass null here to append
the item at the end of list.
I have a patch to fix it.

[fukino, 2014/10/27 09:11:24]

Ah, OK! Thanks.
Done.

     }
     itemElement.update(newItem, targetGroup.isAnimated(item.id));
   } else {