Inline scripts were extracted from Polymer elements.

third_party/polymer/components-chromium/paper-checkbox/paper-checkbox.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: inline-block;
+  white-space: nowrap;
+}
+
+:host(:focus) {
+  outline: none;
+}
+
+#checkboxContainer {
+  position: relative;
+  width: 18px;
+  height: 18px;
+  cursor: pointer;
+  -webkit-transform: translateZ(0);
+  transform: translateZ(0);
+}
+
+#checkboxContainer.labeled {
+  display: inline-block;
+  vertical-align: middle;
+}
+
+#ink {
+  position: absolute;
+  top: -15px;
+  left: -15px;
+  width: 48px;
+  height: 48px;
+  color: #5a5f5a;
+}
+
+#ink[checked] {
+  color: #0f9d58;
+}
+
+#checkbox {
+  position: absolute;
+  box-sizing: border-box;
+  top: 0px;
+  left: 0px; 
+  width: 18px;
+  height: 18px;
+  border: solid 2px;
+  border-color: #5a5a5a;
+  pointer-events: none;
+}
+
+/* checkbox checked animations */
+#checkbox.checked.box {
+  border: solid 2px;
+  -webkit-animation: box-shrink 140ms ease-out forwards;
+  animation: box-shrink 140ms ease-out forwards;
+}
+
+@-webkit-keyframes box-shrink {
+  0% {
+    -webkit-transform: rotate(0deg);
+    top: 0px;
+    left: 0px;
+    width: 18px;
+    height: 18px;
+  }
+  100% {
+    -webkit-transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+}
+
+@keyframes box-shrink {
+  0% {
+    transform: rotate(0deg);
+    top: 0px;
+    left: 0px;
+    width: 18px;
+    height: 18px;
+  }
+  100% {
+    transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+}
+
+#checkbox.checked.checkmark {
+  border-left: none;
+  border-top: none;
+  -webkit-animation: checkmark-expand 140ms ease-out forwards;
+  animation: checkmark-expand 140ms ease-out forwards;
+}
+
+@-webkit-keyframes checkmark-expand {
+  0% {
+    -webkit-transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+  100% {
+    -webkit-transform: rotate(45deg);
+    top: -4px;
+    left: 6px; 
+    width: 10px;
+    height: 21px;
+    border-right-width: 2px;
+    border-bottom-width: 2px;
+  }
+}
+
+@keyframes checkmark-expand {
+  0% {
+    transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+  100% {
+    transform: rotate(45deg);
+    top: -4px;
+    left: 6px; 
+    width: 10px;
+    height: 21px;
+    border-right-width: 2px;
+    border-bottom-width: 2px;
+  }
+}
+
+#checkbox.checked {
+  -webkit-transform: rotate(45deg);
+  transform: rotate(45deg);
+  top: -4px;
+  left: 6px;
+  width: 10px;
+  height: 21px;
+  border-top: none;
+  border-left: none;
+  border-right-width: 2px;
+  border-bottom-width: 2px;
+  border-color: #0f9d58;
+}
+
+/* checkbox unchecked animations */
+#checkbox.unchecked.checkmark {
+  -webkit-transform: rotate(45deg);
+  transform: rotate(45deg);
+  border-left: none;
+  border-top: none;
+  -webkit-animation: checkmark-shrink 140ms ease-out forwards;
+  animation: checkmark-shrink 140ms ease-out forwards;
+}
+
+@-webkit-keyframes checkmark-shrink {
+  0% {
+    top: -4px;
+    left: 6px; 
+    width: 10px;
+    height: 21px;
+    border-right-width: 2px;
+    border-bottom-width: 2px;
+  }
+  100% {
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+}
+
+@keyframes checkmark-shrink {
+  0% {
+    top: -4px;
+    left: 6px; 
+    width: 10px;
+    height: 21px;
+    border-right-width: 2px;
+    border-bottom-width: 2px;
+  }
+  100% {
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+}
+
+#checkbox.unchecked.box {
+  -webkit-animation: box-expand 140ms ease-out forwards;
+  animation: box-expand 140ms ease-out forwards;
+}
+
+@-webkit-keyframes box-expand {
+  0% {
+    -webkit-transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+  100% {
+    -webkit-transform: rotate(0deg);
+    top: 0px;
+    left: 0px;
+    width: 18px;
+    height: 18px;
+  }
+}
+
+@keyframes box-expand {
+  0% {
+    transform: rotate(45deg);
+    top: 13px;
+    left: 5px;
+    width: 4px;
+    height: 4px;
+  }
+  100% {
+    transform: rotate(0deg);
+    top: 0px;
+    left: 0px;
+    width: 18px;
+    height: 18px;
+  }
+}
+
+/* label */
+#checkboxLabel {
+  position: relative;
+  display: inline-block;
+  vertical-align: middle;
+  padding-left: 8px;
+  white-space: normal;
+  pointer-events: none;
+}
+
+#checkboxLabel[hidden] {
+  display: none;
+}
+
+/* disabled state */
+:host([disabled]) {
+  pointer-events: none;
+}
+
+:host([disabled]) #checkbox {
+  border-color: #eaeaea !important;
+}