Remove Polymer 0.5.

third_party/polymer/components-chromium/paper-tabs/paper-tab.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 {
-  position: relative;
-  overflow: hidden;
-  cursor: default;
-}
-
-.tab-content {
-  transition: opacity .1s cubic-bezier(0.4, 0.0, 1, 1), color .1s cubic-bezier(0.4, 0.0, 1, 1);
-  height: 100%;
-  margin: 0 12px;
-}
-
-:host-context(#tabsContainer.scrollable) .tab-content {
-  margin: 0 24px;
-}
-
-:host-context(paper-tabs[link]) .tab-content {
-  margin: 0 !important;
-}
-
-polyfill-next-selector { content: '.core-narrow #tabsContainer.scrollable :host .tab-content'; }
-:host-context(.core-narrow):host-context(#tabsContainer.scrollable) .tab-content {
-  margin: 0 12px;
-}
-
-:host(:not(.core-selected)) .tab-content {
-  opacity: 0.6;
-}
-
-#ink {
-  position: absolute;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  color: #ffff8d;
-  pointer-events: none;
-}
-
-polyfill-next-selector { content: '.tab-content > a'; }
-::content > a {
-  height: 100%;
-  padding: 0 12px;
-  /* flex */
-  -ms-flex: 1 1 0.000000001px;
-  -webkit-flex: 1;
-  flex: 1;
-  -webkit-flex-basis: 0.000000001px;
-  flex-basis: 0.000000001px;
-}