Roll third_party/polymer.

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

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 @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
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 <link rel="import" href="../polymer/polymer.html">
 
 <!--
 The `<iron-flex-layout>` component provides simple ways to use
 [CSS flexible box layout](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes),
 also known as flexbox. This component provides two different ways to use flexbox:
 
 1. [Layout classes](https://github.com/PolymerElements/iron-flex-layout/tree/master/iron-flex-layout-classes.html).
 The layout class stylesheet provides a simple set of class-based flexbox rules, that
 let you specify layout properties directly in markup. You must include this file
 in every element that needs to use them.
 
-Sample use:
+  Sample use:
 
-    <link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
-    <style is="custom-style" include="iron-flex iron-flex-alignment">
+      <link rel="import" href="../iron-flex-layout/iron-flex-layout-classes.html">
+      <style is="custom-style" include="iron-flex iron-flex-alignment"></style>
 
-    <div class="layout horizontal layout-start">
-      <div>cross axis start alignment</div>
-    </div>
+      <div class="layout horizontal layout-start">
+        <div>cross axis start alignment</div>
+      </div>
 
 2. [Custom CSS mixins](https://github.com/PolymerElements/iron-flex-layout/blob/master/iron-flex-layout.html).
 The mixin stylesheet includes custom CSS mixins that can be applied inside a CSS rule using the `@apply` function.
 
 Please note that the old [/deep/ layout classes](https://github.com/PolymerElements/iron-flex-layout/tree/master/classes)
 are deprecated, and should not be used. To continue using layout properties
 directly in markup, please switch to using the new `dom-module`-based
 [layout classes](https://github.com/PolymerElements/iron-flex-layout/tree/master/iron-flex-layout-classes.html).
 Please note that the new version does not use `/deep/`, and therefore requires you
 to import the `dom-modules` in every element that needs to use them.
@@ skipping 170 matching lines @@
       -webkit-align-items: center;
       align-items: center;
     };
 
     --layout-end: {
       -ms-flex-align: end;
       -webkit-align-items: flex-end;
       align-items: flex-end;
     };
 
+    --layout-baseline: {
+      -ms-flex-align: baseline;
+      -webkit-align-items: baseline;
+      align-items: baseline;
+    };
+
     /* alignment in main axis */
 
     --layout-start-justified: {
       -ms-flex-pack: start;
       -webkit-justify-content: flex-start;
       justify-content: flex-start;
     };
 
     --layout-center-justified: {
       -ms-flex-pack: center;
@@ skipping 43 matching lines @@
       -webkit-align-self: flex-end;
       align-self: flex-end;
     };
 
     --layout-self-stretch: {
       -ms-align-self: stretch;
       -webkit-align-self: stretch;
       align-self: stretch;
     };
 
+    --layout-self-baseline: {
+      -ms-align-self: baseline;
+      -webkit-align-self: baseline;
+      align-self: baseline;
+    };
+
+    /* multi-line alignment in main axis */
+
+    --layout-start-aligned: {
+      -ms-flex-line-pack: start;  /* IE10 */
+      -ms-align-content: flex-start;
+      -webkit-align-content: flex-start;
+      align-content: flex-start;
+    };
+
+    --layout-end-aligned: {
+      -ms-flex-line-pack: end;  /* IE10 */
+      -ms-align-content: flex-end;
+      -webkit-align-content: flex-end;
+      align-content: flex-end;
+    };
+
+    --layout-center-aligned: {
+      -ms-flex-line-pack: center;  /* IE10 */
+      -ms-align-content: center;
+      -webkit-align-content: center;
+      align-content: center;
+    };
+
+    --layout-between-aligned: {
+      -ms-flex-line-pack: justify;  /* IE10 */
+      -ms-align-content: space-between;
+      -webkit-align-content: space-between;
+      align-content: space-between;
+    };
+
+    --layout-around-aligned: {
+      -ms-flex-line-pack: distribute;  /* IE10 */
+      -ms-align-content: space-around;
+      -webkit-align-content: space-around;
+      align-content: space-around;
+    };
+
     /*******************************
               Other Layout
     *******************************/
 
     --layout-block: {
       display: block;
     };
 
     --layout-invisible: {
       visibility: hidden !important;
@@ skipping 47 matching lines @@
     --layout-fixed-left: {
       position: fixed;
       top: 0;
       bottom: 0;
       left: 0;
     };
 
   }
 
 </style>