Roll third_party/polymer.

third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js

Index: third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js
diff --git a/third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js b/third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js
index cfdf031fc0d74323d92f7b343795943d235baedb..e8b03e9e97eadee3c144ba4288ea6b96e92832d2 100644
--- a/third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js
+++ b/third_party/polymer/v1_0/components-chromium/iron-menu-behavior/iron-menu-behavior-extracted.js
@@ -61,6 +61,8 @@
      * @param {string|number} value the value to select.
      */
     select: function(value) {
+      // Cancel automatically focusing a default item if the menu received focus
+      // through a user action selecting a particular item.
       if (this._defaultFocusAsync) {
         this.cancelAsync(this._defaultFocusAsync);
         this._defaultFocusAsync = null;
@@ -231,8 +233,6 @@
         return;
       }
 
-      this.blur();
-
       // clear the cached focus item
       this._defaultFocusAsync = this.async(function() {
         // focus the selected item when the menu receives focus, or the first item
@@ -243,11 +243,10 @@
 
         if (selectedItem) {
           this._setFocusedItem(selectedItem);
-        } else {
+        } else if (this.items[0]) {
           this._setFocusedItem(this.items[0]);
         }
-      // async 1ms to wait for `select` to get called from `_itemActivate`
-      }, 1);
+      });
     },
 
     /**