[MD settings] merge polymer 1.0.11; hack for settings checkbox

third_party/polymer/v1_0/components-chromium/iron-flex-layout/iron-flex-layout.html

 <!--
 @license
 Copyright (c) 2015 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.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 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.txt
 -->
 
 <link rel="import" href="../polymer/polymer.html">
 
+<style>
+  /* IE 10 support for HTML5 hidden attr */
+  [hidden] {
+    display: none !important;
+  }
+</style>
+
 <style is="custom-style">
-
   :root {
 
     --layout: {
       display: -ms-flexbox;
       display: -webkit-flex;
       display: flex;
     };
 
     --layout-inline: {
       display: -ms-inline-flexbox;
@@ skipping 245 matching lines @@
       left: 0;
     };
 
     --layout-scroll: {
       -webkit-overflow-scrolling: touch;
       overflow: auto;
     };
 
     /* fixed position */
 
-    --layout-fixed-bottom:,
-    --layout-fixed-left:,
-    --layout-fixed-right:,
     --layout-fixed-top: {
       position: fixed;
-    };
-
-    --layout-fixed-top: {
       top: 0;
       left: 0;
       right: 0;
     };
 
     --layout-fixed-right: {
+      position: fixed;
       top: 0;
       right: 0;
       bottom: 0;
     };
 
     --layout-fixed-bottom: {
+      position: fixed;
       right: 0;
       bottom: 0;
       left: 0;
     };
 
     --layout-fixed-left: {
+      position: fixed;
       top: 0;
       bottom: 0;
       left: 0;
     };
 
   }
 
 </style>