Remove Polymer 0.5.

third_party/polymer/components-chromium/core-scroll-header-panel/core-scroll-header-panel.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;
-  position: relative;
-  overflow: hidden;
-}
-
-#mainContainer {
-  position: absolute;
-  top: 0;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  box-sizing: border-box;
-  -moz-box-sizing: border-box;
-  -webkit-overflow-scrolling: touch;
-  overflow-x: hidden;
-  overflow-y: auto;
-}
-
-#headerContainer {
-  position: absolute;
-  top: 0;
-  right: 0;
-  left: 0;
-}
-
-.bg-container {
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  overflow: hidden;
-}
-
-#headerBg, #condensedHeaderBg {
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  background-repeat: no-repeat;
-  background-size: cover;
-  background-position: center center;
-}
-
-#condensedHeaderBg {
-  opacity: 0;
-}