Files.app: Update shared status of icons on grid items.

When grid item is created or metadata is updated, shared status of placeholder was updated, but the icon on the bottom was not updated.
By this CL, updateSharedStatus() updates both.

BUG=469963
TEST=manual test

Review URL: https://codereview.chromium.org/1033553004

Cr-Commit-Position: refs/heads/master@{#321953}

ui/file_manager/file_manager/foreground/js/ui/file_grid.js

@@ -161,6 +161,7 @@ FileGrid.prototype.updateListItemsMetadata = function(type, entries) {
       continue;
 
     this.decorateThumbnailBox_(assertInstanceof(box, HTMLDivElement), entry);
+    this.updateSharedStatus_(assert(listItem), entry);
   }
 };
 
@@ -219,6 +220,8 @@ FileGrid.prototype.decorateThumbnail_ = function(li, entry) {
   bottom.appendChild(filelist.renderFileTypeIcon(li.ownerDocument, entry));
   bottom.appendChild(filelist.renderFileNameLabel(li.ownerDocument, entry));
   frame.appendChild(bottom);
+
+  this.updateSharedStatus_(li, entry);
 };
 
 /**
@@ -226,12 +229,9 @@ FileGrid.prototype.decorateThumbnail_ = function(li, entry) {
  *
  * @param {!HTMLDivElement} box Box to decorate.
  * @param {Entry} entry Entry which thumbnail is generating for.
- * @param {function(HTMLImageElement)=} opt_imageLoadCallback Callback called
- *     when the image has been loaded before inserting it into the DOM.
  * @private
  */
-FileGrid.prototype.decorateThumbnailBox_ = function(
-    box, entry, opt_imageLoadCallback) {
+FileGrid.prototype.decorateThumbnailBox_ = function(box, entry) {
   box.className = 'img-container';
 
   if (this.importStatusVisible_ &&
@@ -245,12 +245,6 @@ FileGrid.prototype.decorateThumbnailBox_ = function(
 
   if (entry.isDirectory) {
     box.setAttribute('generic-thumbnail', 'folder');
-
-    var shared = !!this.metadataModel_.getCache([entry], ['shared'])[0].shared;
-    box.classList.toggle('shared', shared);
-
-    if (opt_imageLoadCallback)
-      setTimeout(opt_imageLoadCallback, 0, null /* callback parameter */);
     return;
   }
 
@@ -267,6 +261,25 @@ FileGrid.prototype.decorateThumbnailBox_ = function(
   }
 };
 
+/**
+ * Added 'shared' class to icon and placeholder of a folder item.
+ * @param {!HTMLLIElement} li The grid item.
+ * @param {!Entry} entry File entry for the grid item.
+ * @private
+ */
+FileGrid.prototype.updateSharedStatus_ = function(li, entry) {
+  if (!entry.isDirectory)
+    return;
+
+  var shared = !!this.metadataModel_.getCache([entry], ['shared'])[0].shared;
+  var box = li.querySelector('.img-container');
+  if (box)
+    box.classList.toggle('shared', shared);
+  var icon = li.querySelector('.detail-icon');
+  if (icon)
+    icon.classList.toggle('shared', shared);
+};
+
 /**
  * Sets the visibility of the cloud import status column.
  * @param {boolean} visible