Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/paper-styles/classes/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="shadow-layout.html">
+
+<style>
+
+  /*******************************
+            Flex Layout
+  *******************************/
+
+  .layout.horizontal,
+  .layout.horizontal-reverse,
+  .layout.vertical,
+  .layout.vertical-reverse {
+    display: -ms-flexbox;
+    display: -webkit-flex;
+    display: flex;
+  }
+
+  .layout.inline {
+    display: -ms-inline-flexbox;
+    display: -webkit-inline-flex;
+    display: inline-flex;
+  }
+
+  .layout.horizontal {
+    -ms-flex-direction: row;
+    -webkit-flex-direction: row;
+    flex-direction: row;
+  }
+
+  .layout.horizontal-reverse {
+    -ms-flex-direction: row-reverse;
+    -webkit-flex-direction: row-reverse;
+    flex-direction: row-reverse;
+  }
+
+  .layout.vertical {
+    -ms-flex-direction: column;
+    -webkit-flex-direction: column;
+    flex-direction: column;
+  }
+
+  .layout.vertical-reverse {
+    -ms-flex-direction: column-reverse;
+    -webkit-flex-direction: column-reverse;
+    flex-direction: column-reverse;
+  }
+
+  .layout.wrap {
+    -ms-flex-wrap: wrap;
+    -webkit-flex-wrap: wrap;
+    flex-wrap: wrap;
+  }
+
+  .layout.wrap-reverse {
+    -ms-flex-wrap: wrap-reverse;
+    -webkit-flex-wrap: wrap-reverse;
+    flex-wrap: wrap-reverse;
+  }
+
+  .flex-auto {
+    -ms-flex: 1 1 auto;
+    -webkit-flex: 1 1 auto;
+    flex: 1 1 auto;
+  }
+
+  .flex-none {
+    -ms-flex: none;
+    -webkit-flex: none;
+    flex: none;
+  }
+
+  .flex,
+  .flex-1 {
+    -ms-flex: 1;
+    -webkit-flex: 1;
+    flex: 1;
+  }
+
+  .flex-2 {
+    -ms-flex: 2;
+    -webkit-flex: 2;
+    flex: 2;
+  }
+
+  .flex-3 {
+    -ms-flex: 3;
+    -webkit-flex: 3;
+    flex: 3;
+  }
+
+  .flex-4 {
+    -ms-flex: 4;
+    -webkit-flex: 4;
+    flex: 4;
+  }
+
+  .flex-5 {
+    -ms-flex: 5;
+    -webkit-flex: 5;
+    flex: 5;
+  }
+
+  .flex-6 {
+    -ms-flex: 6;
+    -webkit-flex: 6;
+    flex: 6;
+  }
+
+  .flex-7 {
+    -ms-flex: 7;
+    -webkit-flex: 7;
+    flex: 7;
+  }
+
+  .flex-8 {
+    -ms-flex: 8;
+    -webkit-flex: 8;
+    flex: 8;
+  }
+
+  .flex-9 {
+    -ms-flex: 9;
+    -webkit-flex: 9;
+    flex: 9;
+  }
+
+  .flex-10 {
+    -ms-flex: 10;
+    -webkit-flex: 10;
+    flex: 10;
+  }
+
+  .flex-11 {
+    -ms-flex: 11;
+    -webkit-flex: 11;
+    flex: 11;
+  }
+
+  .flex-12 {
+    -ms-flex: 12;
+    -webkit-flex: 12;
+    flex: 12;
+  }
+
+  /* alignment in cross axis */
+
+  .layout.start {
+    -ms-flex-align: start;
+    -webkit-align-items: flex-start;
+    align-items: flex-start;
+  }
+
+  .layout.center,
+  .layout.center-center {
+    -ms-flex-align: center;
+    -webkit-align-items: center;
+    align-items: center;
+  }
+
+  .layout.end {
+    -ms-flex-align: end;
+    -webkit-align-items: flex-end;
+    align-items: flex-end;
+  }
+
+  /* alignment in main axis */
+
+  .layout.start-justified {
+    -ms-flex-pack: start;
+    -webkit-justify-content: flex-start;
+    justify-content: flex-start;
+  }
+
+  .layout.center-justified,
+  .layout.center-center {
+    -ms-flex-pack: center;
+    -webkit-justify-content: center;
+    justify-content: center;
+  }
+
+  .layout.end-justified {
+    -ms-flex-pack: end;
+    -webkit-justify-content: flex-end;
+    justify-content: flex-end;
+  }
+
+  .layout.around-justified {
+    -ms-flex-pack: around;
+    -webkit-justify-content: space-around;
+    justify-content: space-around;
+  }
+
+  .layout.justified {
+    -ms-flex-pack: justify;
+    -webkit-justify-content: space-between;
+    justify-content: space-between;
+  }
+
+  /* self alignment */
+
+  .self-start {
+    -ms-align-self: flex-start;
+    -webkit-align-self: flex-start;
+    align-self: flex-start;
+  }
+
+  .self-center {
+    -ms-align-self: center;
+    -webkit-align-self: center;
+    align-self: center;
+  }
+
+  .self-end {
+    -ms-align-self: flex-end;
+    -webkit-align-self: flex-end;
+    align-self: flex-end;
+  }
+
+  .self-stretch {
+    -ms-align-self: stretch;
+    -webkit-align-self: stretch;
+    align-self: stretch;
+  }
+
+  /*******************************
+            Other Layout
+  *******************************/
+
+  .block {
+    display: block;
+  }
+
+  /* IE 10 support for HTML5 hidden attr */
+  [hidden] {
+    display: none !important;
+  }
+
+  .invisible {
+    visibility: hidden !important;
+  }
+
+  .relative {
+    position: relative;
+  }
+
+  .fit {
+    position: absolute;
+    top: 0;
+    right: 0;
+    bottom: 0;
+    left: 0;
+  }
+
+  body.fullbleed {
+    margin: 0;
+    height: 100vh;
+  }
+
+  .scroll {
+    -webkit-overflow-scrolling: touch;
+    overflow: auto;
+  }
+
+  /* fixed position */
+
+  .fixed-bottom,
+  .fixed-left,
+  .fixed-right,
+  .fixed-top {
+    position: fixed;
+  }
+
+  .fixed-top {
+    top: 0;
+    left: 0;
+    right: 0;
+  }
+
+  .fixed-right {
+    top: 0;
+    right: 0;
+    bottom: 0;
+  }
+
+  .fixed-bottom {
+    right: 0;
+    bottom: 0;
+    left: 0;
+  }
+
+  .fixed-left {
+    top: 0;
+    bottom: 0;
+    left: 0;
+  }
+
+</style>