Remove Polymer 0.5.

third_party/polymer/components-chromium/paper-tabs/paper-tabs.css

-/*
-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.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
-*/
-
-:host {
-  display: block;
-  font-size: 14px;
-  font-weight: 500;
-  height: 48px;
-  overflow: hidden;
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  -ms-user-select: none;
-  user-select: none;
-  -webkit-tap-highlight-color: rgba(0,0,0,0);
-}
-
-#tabsContainer {
-  position: relative;
-  height: 100%;
-  white-space: nowrap;
-  overflow: hidden;
-}
-
-#tabsContent {
-  height: 100%;
-}
-
-#tabsContainer.scrollable > #tabsContent {
-  position: absolute;
-  white-space: nowrap;
-}
-
-.scroll-button {
-  width: 40px;
-  padding: 0 12px;
-}
-
-.scroll-button > paper-icon-button {
-  transition: opacity 0.18s;
-}
-
-.scroll-button > .hidden {
-  opacity: 0;
-}
-
-#selectionBar {
-  position: absolute;
-  height: 2px;
-  bottom: 0;
-  left: 0;
-  width: 0;
-  background-color: #ffff8d;
-  transition: width, left;
-}
-
-#selectionBar.expand {
-  transition-duration: 0.15s;
-  transition-timing-function: cubic-bezier(0.4, 0.0, 1, 1);
-}
-
-#selectionBar.contract {
-  transition-duration: 0.18s;
-  transition-timing-function: cubic-bezier(0.0, 0.0, 0.2, 1);
-}
-
-polyfill-next-selector { content: '#tabsContent > *:not(#selectionBar)'; }
-::content > * {
-  height: 100%;
-}