Quick View: Stopped to show orange border when no-preview icon is clicked.

ui/file_manager/file_manager/foreground/elements/files_quick_view.js

Index: ui/file_manager/file_manager/foreground/elements/files_quick_view.js
diff --git a/ui/file_manager/file_manager/foreground/elements/files_quick_view.js b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
index 098912da64be8e39d2c6ef66e1e31daf0199b103..effb083064cfec1bf1e1ef5c35bf9acffabbac0b 100644
--- a/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
+++ b/ui/file_manager/file_manager/foreground/elements/files_quick_view.js
@@ -75,23 +75,21 @@ var FilesQuickView = Polymer({
   onOpenInNewButtonTap: function(event) {},
 
   /**
-   * @param {!Event} event
+   * Close Quick View unless the clicked target or its ancestor contains
+   * 'no-close-on-click' class.
    *
-   * @private
-   */
-  onCloseButtonTap_: function(event) {
-    this.close();
-  },
-
-  /**
    * @param {!Event} event tap event.
    *
    * @private
    */
   onContentPanelTap_: function(event) {
     var target = event.detail.sourceEvent.target;
-    if (target.classList.contains('close-on-click'))
-      this.close();
+    while (target) {
+      if (target.classList.contains('no-close-on-click'))
+        return;
+      target = target.parentElement;
+    }
+    this.close();
   },
 
   /**
@@ -115,17 +113,6 @@ var FilesQuickView = Polymer({
   },
 
   /**
-   * @param {string} contentUrl
-   * @param {string} type
-   * @return {string}
-   *
-   * @private
-   */
-  videoUrl_: function(contentUrl, type) {
-    return this.isVideo_(type) ? contentUrl : "";
-  },
-
-  /**
    * @param {string} type
    * @return {boolean}
    *