Inline scripts were extracted from Polymer elements.

third_party/polymer/components-chromium/core-tooltip/core-tooltip.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 {
+  box-sizing: border-box;
+  position: relative;
+  display: inline-block;
+}
+
+:host(:hover) .polymer-tooltip {
+  visibility: visible !important;
+}
+
+:host(:focus) .polymer-tooltip {
+  visibility: visible !important;
+}
+
+.polymer-tooltip:not(.show) {
+  visibility: hidden;
+}
+
+.polymer-tooltip {
+   pointer-events: none; 
+  position: absolute;
+  display: flex;
+  font-size: 10px;
+  font-family: sans-serif;
+  padding: 8px;
+  color: white;
+  background-color: rgba(0,0,0,0.8);
+  box-sizing: border-box;
+  border-radius: 3px; /* TODO: not in spec. */
+  white-space: nowrap;
+  line-height: 6px;
+  z-index: 1002; /* TODO: this is brittle. */
+}
+
+:host([large]) .polymer-tooltip {
+  line-height: 14px;
+  font-size: 14px;
+  padding: 16px;
+}
+
+.polymer-tooltip.noarrow::after {
+  display: none;
+}
+
+.polymer-tooltip::after {
+  position: absolute;
+  border: solid transparent;
+  content: '';
+  height: 0;
+  width: 0;
+  border-width: 4px;
+}
+
+.top {
+  margin-bottom: 10px; /* TODO: not specified in spec */
+  bottom: 100%;
+}
+
+.right {
+  margin-left: 10px; /* TODO: not specified in spec */
+  left: 100%;
+}
+
+.bottom {
+  top: 100%;
+  margin-top: 10px; /* TODO: not specified in spec */
+}
+
+.left {
+  margin-right: 10px; /* TODO: not specified in spec */
+  right: 100%;
+}
+
+.polymer-tooltip.bottom::after {
+  bottom: 100%;
+  left: calc(50% - 4px);
+  border-bottom-color: rgba(0,0,0,0.8);
+}
+
+.polymer-tooltip.left::after {
+  left: 100%;
+  top: calc(50% - 4px);
+  border-left-color: rgba(0,0,0,0.8);
+}
+
+.polymer-tooltip.top::after {
+  top: 100%;
+  left: calc(50% - 4px);
+  border-top-color: rgba(0,0,0,0.8);
+}
+
+.polymer-tooltip.right::after {
+  right: 100%;
+  top: calc(50% - 4px);
+  border-right-color: rgba(0,0,0,0.8);
+}