Turn on verbose flag for compiling file_manager.

ui/file_manager/gallery/js/gallery.js

Index: ui/file_manager/gallery/js/gallery.js
diff --git a/ui/file_manager/gallery/js/gallery.js b/ui/file_manager/gallery/js/gallery.js
index e343389df27770c8ed4d275fdce861700b5179f7..7e4bd347e8e98d842df83d23a51b8f6f11eab4ee 100644
--- a/ui/file_manager/gallery/js/gallery.js
+++ b/ui/file_manager/gallery/js/gallery.js
@@ -318,7 +318,7 @@ Gallery.prototype.loadInternal_ = function(entries, selectedEntries) {
     var locationInfo = this.volumeManager_.getLocationInfo(entries[i]);
     if (!locationInfo)  // Skip the item, since gone.
       return;
-    items.push(new Gallery.Item(
+    items.push(new GalleryItem(
         entries[i],
         locationInfo,
         null,
@@ -446,14 +446,10 @@ Gallery.prototype.onUserAction_ = function() {
  * @return {Gallery.Mode}
  */
 Gallery.prototype.getCurrentMode = function() {
-  switch (/** @type {(SlideMode|ThumbnailMode)} */ (this.currentMode_)) {
-    case this.slideMode_:
-      return Gallery.Mode.SLIDE;
-    case this.thumbnailMode_:
-      return Gallery.Mode.THUMBNAIL;
-    default:
-      assertNotReached();
-  }
+  assert(this.currentMode_ === this.slideMode_ ||
+         this.currentMode_ === this.thumbnailMode_);
+  return this.currentMode_ === this.slideMode_ ?
+      Gallery.Mode.SLIDE : Gallery.Mode.THUMBNAIL;
 };
 
 /**
@@ -660,7 +656,7 @@ Gallery.prototype.delete_ = function() {
 };
 
 /**
- * @return {!Array<Gallery.Item>} Current selection.
+ * @return {!Array<GalleryItem>} Current selection.
  */
 Gallery.prototype.getSelectedItems = function() {
   return this.selectionModel_.selectedIndexes.map(
@@ -677,7 +673,7 @@ Gallery.prototype.getSelectedEntries = function() {
 };
 
 /**
- * @return {?Gallery.Item} Current single selection.
+ * @return {?GalleryItem} Current single selection.
  */
 Gallery.prototype.getSingleSelectedItem = function() {
   var items = this.getSelectedItems();