Remove Gallery.Item when the corresponding entries are removed in file system.

ui/file_manager/gallery/js/ribbon.js

Index: ui/file_manager/gallery/js/ribbon.js
diff --git a/ui/file_manager/gallery/js/ribbon.js b/ui/file_manager/gallery/js/ribbon.js
index 4cd560ab303725bacc88667c9e376f92354cfe9b..ad57b7a3f087e2c7f9fe37978ba090a0b6c44891 100644
--- a/ui/file_manager/gallery/js/ribbon.js
+++ b/ui/file_manager/gallery/js/ribbon.js
@@ -120,11 +120,6 @@ Ribbon.prototype.disable = function() {
  * @private
  */
 Ribbon.prototype.onSplice_ = function(event) {
-  if (event.removed.length > 1) {
-    console.error('Cannot remove multiple items.');
-    return;
-  }
-
   if (event.removed.length > 0 && event.added.length > 0) {
     console.error('Replacing is not implemented.');
     return;
@@ -144,12 +139,6 @@ Ribbon.prototype.onSplice_ = function(event) {
     return;
   }
 
-  var removed = this.renderCache_[event.removed[0].getEntry().toURL()];
-  if (!removed || !removed.parentNode || !removed.hasAttribute('selected')) {
-    console.error('Can only remove the selected item');
-    return;
-  }
-
   var persistentNodes = this.querySelectorAll('.ribbon-image:not([vanishing])');
   if (this.lastVisibleIndex_ < this.dataModel_.length) { // Not at the end.
     var lastNode = persistentNodes[persistentNodes.length - 1];
@@ -181,9 +170,20 @@ Ribbon.prototype.onSplice_ = function(event) {
     }
   }
 
-  removed.removeAttribute('selected');
-  removed.setAttribute('vanishing', 'smooth');
-  this.scheduleRemove_();
+  var removed = false;
+  for (var i = 0; i < event.removed.length; i++) {
+    var removedDom = this.renderCache_[event.removed[i].getEntry().toURL()];
+    if (removedDom) {
+      removedDom.removeAttribute('selected');
+      removedDom.setAttribute('vanishing', 'smooth');
+      removed = true;
+    }
+  }
+
+  if (removed)
+    this.scheduleRemove_();
+
+  this.onSelection_();
 };
 
 /**