Add script to remove prefixed CSS from third_party/polymer.

third_party/polymer/v1_0/components-chromium/paper-spinner/paper-spinner-styles.html

 <!--
 @license
 Copyright (c) 2015 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
 -->
 
@@ skipping 40 matching lines @@
         width: 100%;
         height: 100%;
 
         /* The spinner does not have any contents that would have to be
          * flipped if the direction changes. Always use ltr so that the
          * style works out correctly in both cases. */
         direction: ltr;
       }
 
       #spinnerContainer.active {
-        -webkit-animation: container-rotate var(--paper-spinner-container-rotation-duration) linear infinite;
         animation: container-rotate var(--paper-spinner-container-rotation-duration) linear infinite;
       }
 
-      @-webkit-keyframes container-rotate {
-        to { -webkit-transform: rotate(360deg) }
-      }
 
       @keyframes container-rotate {
         to { transform: rotate(360deg) }
       }
 
       .spinner-layer {
         position: absolute;
         width: 100%;
         height: 100%;
         opacity: 0;
@@ skipping 19 matching lines @@
 
       /**
        * IMPORTANT NOTE ABOUT CSS ANIMATION PROPERTIES (keanulee):
        *
        * iOS Safari (tested on iOS 8.1) does not handle animation-delay very well - it doesn't
        * guarantee that the animation will start _exactly_ after that value. So we avoid using
        * animation-delay and instead set custom keyframes for each color (as layer-2undant as it
        * seems).
        */
       .active .spinner-layer {
-        -webkit-animation-name: fill-unfill-rotate;
-        -webkit-animation-duration: var(--paper-spinner-full-cycle-duration);
-        -webkit-animation-timing-function: cubic-bezier(0.4, 0.0, 0.2, 1);
-        -webkit-animation-iteration-count: infinite;
         animation-name: fill-unfill-rotate;
         animation-duration: var(--paper-spinner-full-cycle-duration);
         animation-timing-function: cubic-bezier(0.4, 0.0, 0.2, 1);
         animation-iteration-count: infinite;
         opacity: 1;
       }
 
       .active .spinner-layer.layer-1 {
-        -webkit-animation-name: fill-unfill-rotate, layer-1-fade-in-out;
         animation-name: fill-unfill-rotate, layer-1-fade-in-out;
       }
 
       .active .spinner-layer.layer-2 {
-        -webkit-animation-name: fill-unfill-rotate, layer-2-fade-in-out;
         animation-name: fill-unfill-rotate, layer-2-fade-in-out;
       }
 
       .active .spinner-layer.layer-3 {
-        -webkit-animation-name: fill-unfill-rotate, layer-3-fade-in-out;
         animation-name: fill-unfill-rotate, layer-3-fade-in-out;
       }
 
       .active .spinner-layer.layer-4 {
-        -webkit-animation-name: fill-unfill-rotate, layer-4-fade-in-out;
         animation-name: fill-unfill-rotate, layer-4-fade-in-out;
       }
 
-      @-webkit-keyframes fill-unfill-rotate {
-        12.5% { -webkit-transform: rotate(135deg) } /* 0.5 * ARCSIZE */
-        25%   { -webkit-transform: rotate(270deg) } /* 1   * ARCSIZE */
-        37.5% { -webkit-transform: rotate(405deg) } /* 1.5 * ARCSIZE */
-        50%   { -webkit-transform: rotate(540deg) } /* 2   * ARCSIZE */
-        62.5% { -webkit-transform: rotate(675deg) } /* 2.5 * ARCSIZE */
-        75%   { -webkit-transform: rotate(810deg) } /* 3   * ARCSIZE */
-        87.5% { -webkit-transform: rotate(945deg) } /* 3.5 * ARCSIZE */
-        to    { -webkit-transform: rotate(1080deg) } /* 4   * ARCSIZE */
-      }
 
       @keyframes fill-unfill-rotate {
         12.5% { transform: rotate(135deg) } /* 0.5 * ARCSIZE */
         25%   { transform: rotate(270deg) } /* 1   * ARCSIZE */
         37.5% { transform: rotate(405deg) } /* 1.5 * ARCSIZE */
         50%   { transform: rotate(540deg) } /* 2   * ARCSIZE */
         62.5% { transform: rotate(675deg) } /* 2.5 * ARCSIZE */
         75%   { transform: rotate(810deg) } /* 3   * ARCSIZE */
         87.5% { transform: rotate(945deg) } /* 3.5 * ARCSIZE */
         to    { transform: rotate(1080deg) } /* 4   * ARCSIZE */
       }
 
-      @-webkit-keyframes layer-1-fade-in-out {
-        0% { opacity: 1 }
-        25% { opacity: 1 }
-        26% { opacity: 0 }
-        89% { opacity: 0 }
-        90% { opacity: 1 }
-        to { opacity: 1 }
-      }
 
       @keyframes layer-1-fade-in-out {
         0% { opacity: 1 }
         25% { opacity: 1 }
         26% { opacity: 0 }
         89% { opacity: 0 }
         90% { opacity: 1 }
         to { opacity: 1 }
       }
 
-      @-webkit-keyframes layer-2-fade-in-out {
-        0% { opacity: 0 }
-        15% { opacity: 0 }
-        25% { opacity: 1 }
-        50% { opacity: 1 }
-        51% { opacity: 0 }
-        to { opacity: 0 }
-      }
 
       @keyframes layer-2-fade-in-out {
         0% { opacity: 0 }
         15% { opacity: 0 }
         25% { opacity: 1 }
         50% { opacity: 1 }
         51% { opacity: 0 }
         to { opacity: 0 }
       }
 
-      @-webkit-keyframes layer-3-fade-in-out {
-        0% { opacity: 0 }
-        40% { opacity: 0 }
-        50% { opacity: 1 }
-        75% { opacity: 1 }
-        76% { opacity: 0 }
-        to { opacity: 0 }
-      }
 
       @keyframes layer-3-fade-in-out {
         0% { opacity: 0 }
         40% { opacity: 0 }
         50% { opacity: 1 }
         75% { opacity: 1 }
         76% { opacity: 0 }
         to { opacity: 0 }
       }
 
-      @-webkit-keyframes layer-4-fade-in-out {
-        0% { opacity: 0 }
-        65% { opacity: 0 }
-        75% { opacity: 1 }
-        90% { opacity: 1 }
-        to { opacity: 0 }
-      }
 
       @keyframes layer-4-fade-in-out {
         0% { opacity: 0 }
         65% { opacity: 0 }
         75% { opacity: 1 }
         90% { opacity: 1 }
         to { opacity: 0 }
       }
 
       .circle-clipper {
@@ skipping 29 matching lines @@
       .circle-clipper::after {
         bottom: 0;
         width: 200%;
         border-style: solid;
         border-bottom-color: transparent !important;
       }
 
       .circle-clipper.left::after {
         left: 0;
         border-right-color: transparent !important;
-        -webkit-transform: rotate(129deg);
         transform: rotate(129deg);
       }
 
       .circle-clipper.right::after {
         left: -100%;
         border-left-color: transparent !important;
-        -webkit-transform: rotate(-129deg);
         transform: rotate(-129deg);
       }
 
       .active .gap-patch::after,
       .active .circle-clipper::after {
-        -webkit-animation-duration: var(--paper-spinner-expand-contract-duration);
-        -webkit-animation-timing-function: cubic-bezier(0.4, 0.0, 0.2, 1);
-        -webkit-animation-iteration-count: infinite;
         animation-duration: var(--paper-spinner-expand-contract-duration);
         animation-timing-function: cubic-bezier(0.4, 0.0, 0.2, 1);
         animation-iteration-count: infinite;
       }
 
       .active .circle-clipper.left::after {
-        -webkit-animation-name: left-spin;
         animation-name: left-spin;
       }
 
       .active .circle-clipper.right::after {
-        -webkit-animation-name: right-spin;
         animation-name: right-spin;
       }
 
-      @-webkit-keyframes left-spin {
-        0% { -webkit-transform: rotate(130deg) }
-        50% { -webkit-transform: rotate(-5deg) }
-        to { -webkit-transform: rotate(130deg) }
-      }
 
       @keyframes left-spin {
         0% { transform: rotate(130deg) }
         50% { transform: rotate(-5deg) }
         to { transform: rotate(130deg) }
       }
 
-      @-webkit-keyframes right-spin {
-        0% { -webkit-transform: rotate(-130deg) }
-        50% { -webkit-transform: rotate(5deg) }
-        to { -webkit-transform: rotate(-130deg) }
-      }
 
       @keyframes right-spin {
         0% { transform: rotate(-130deg) }
         50% { transform: rotate(5deg) }
         to { transform: rotate(-130deg) }
       }
 
       #spinnerContainer.cooldown {
-        -webkit-animation: container-rotate var(--paper-spinner-container-rotation-duration) linear infinite, fade-out var(--paper-spinner-cooldown-duration) cubic-bezier(0.4, 0.0, 0.2, 1);
         animation: container-rotate var(--paper-spinner-container-rotation-duration) linear infinite, fade-out var(--paper-spinner-cooldown-duration) cubic-bezier(0.4, 0.0, 0.2, 1);
       }
 
-      @-webkit-keyframes fade-out {
-        0% { opacity: 1 }
-        to { opacity: 0 }
-      }
 
       @keyframes fade-out {
         0% { opacity: 1 }
         to { opacity: 0 }
       }
     </style>
   </template>
 </dom-module>