MD Downloads: rework "more actions" menu focus handling code

chrome/browser/resources/md_downloads/crisper.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview Assertion support.
  */
 
 /**
  * Verify |condition| is truthy and return |condition| if so.
@@ skipping 11359 matching lines @@
     /** @return {boolean} Whether "Clear all" should be allowed. */
     canClearAll: function() {
       return !this.$['search-input'].getValue() && this.downloadsShowing;
     },
 
     onFindCommand: function() {
       this.$['search-input'].showAndFocus();
     },
 
     /** @private */
-    onClearAllTap_: function() {
-      assert(this.canClearAll());
-      downloads.ActionService.getInstance().clearAll();
+    closeMoreActions_: function(e) {
+      this.$.more.close();
     },
 
     /** @private */
     downloadsShowingChanged_: function() {
       this.updateClearAll_();
     },
 
     /** @private */
+    onClearAllTap_: function() {
+      assert(this.canClearAll());
+      downloads.ActionService.getInstance().clearAll();
+    },
+
+    /** @private */
     onPaperDropdownClose_: function() {
-      window.removeEventListener('resize', assert(this.boundResize_));
+      window.removeEventListener('resize', assert(this.boundClose_));
+    },
+
+    /**
+     * @param {!Event} e
+     * @private
+     */
+    onItemBlur_: function(e) {
+      if (this.$$('paper-menu').items.indexOf(e.relatedTarget) >= 0)
+        return;
+
+      // This can be this.$.more.restoreFocusOnClose = false when this lands:
+      // https://github.com/PolymerElements/paper-menu-button/pull/94
+      this.$.more.$.dropdown.restoreFocusOnClose = false;
+      this.closeMoreActions_();
+      this.$.more.$.dropdown.restoreFocusOnClose = true;
     },
 
     /** @private */
     onPaperDropdownOpen_: function() {
-      this.boundResize_ = this.boundResize_ || function() {
-        this.$.more.close();
-      }.bind(this);
-      window.addEventListener('resize', this.boundResize_);
+      this.boundClose_ = this.boundClose_ || this.closeMoreActions_.bind(this);
+      window.addEventListener('resize', this.boundClose_);
     },
 
     /**
      * @param {!CustomEvent} event
      * @private
      */
     onSearchChanged_: function(event) {
       downloads.ActionService.getInstance().search(
           /** @type {string} */ (event.detail));
       this.updateClearAll_();
@@ skipping 201 matching lines @@
     Manager.get().updateItem_(index, data);
   };
 
   return {Manager: Manager};
 });
 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 window.addEventListener('load', downloads.Manager.onLoad);