Inline scripts were extracted from Polymer elements.

third_party/polymer/components-chromium/core-menu/core-submenu.html

+<!--
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE
+The complete set of authors may be found at http://polymer.github.io/AUTHORS
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS
+-->
+
+<!--
+Use to create nested menus inside of `core-menu` elements.
+
+    <core-menu selected="0">
+    
+      <core-submenu icon="settings" label="Topics">
+        <core-item label="Topic 1"></core-item>
+        <core-item label="Topic 2"></core-item>
+      </core-submenu>
+      
+      <core-submenu icon="settings" label="Favorites">
+        <core-item label="Favorite 1"></core-item>
+        <core-item label="Favorite 2"></core-item>
+        <core-item label="Favorite 3"></core-item>
+      </core-submenu>
+      
+    </core-menu>
+    
+There is a margin set on the submenu to indent the items.
+You can override the margin by doing:
+
+    core-submenu::shadow #submenu {
+      margin-left: 20px;
+    }
+
+@group Polymer Core Elements
+@element core-submenu
+@extends core-item
+-->
+
+<link rel="import" href="../core-item/core-item.html">
+<link rel="import" href="core-menu.html">
+<link rel="import" href="../core-collapse/core-collapse.html">
+
+<polymer-element name="core-submenu" attributes="selected selectedItem label icon src valueattr" assetpath="">
+<template>
+
+  <link rel="stylesheet" href="core-submenu.css">
+
+  <core-item src="{{src}}" label="{{label}}" icon="{{icon}}" class="{{ {&apos;core-selected&apos; : active} | tokenList}}" on-tap="{{activate}}">
+    <content select=".item-content"></content>
+  </core-item>
+
+  <core-menu id="submenu" selected="{{selected}}" selecteditem="{{selectedItem}}" valueattr="{{valueattr}}">
+    <content></content>
+  </core-menu>
+
+  <core-collapse target="{{$.submenu}}" opened="{{opened}}"></core-collapse>
+
+</template>
+
+</polymer-element>
+<script src="core-submenu-extracted.js"></script>