Media Router: remove iron-icons/ dependency

Part of the effort to remove iron-icons/*.html iconsets from the repro.

Screenshot showing icons unchanged from before:
https://imgur.com/a/1iDQh03

Bug: 855205
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: Iac109e42bee49be6467e40746e3e54d4ab200826
Reviewed-on: https://chromium-review.googlesource.com/1139220Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Commit-Queue: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576231}

chrome/browser/resources/media_router/elements/route_controls/route_controls.html

@@ -3,8 +3,18 @@
 <link rel="import" href="chrome://resources/cr_elements/cr_checkbox/cr_checkbox.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
-<link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/av-icons.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/iron-iconset-svg/iron-iconset-svg.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-slider/paper-slider.html">
+
+<iron-iconset-svg name="route-controls" size="24">
+<svg><defs>
+  <g id="play-arrow"><path d="M8 5v14l11-7z"></path></g>
+  <g id="pause"><path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z"></path></g>
+  <g id="volume-off"><path d="M16.5 12c0-1.77-1.02-3.29-2.5-4.03v2.21l2.45 2.45c.03-.2.05-.41.05-.63zm2.5 0c0 .94-.2 1.82-.54 2.64l1.51 1.51C20.63 14.91 21 13.5 21 12c0-4.28-2.99-7.86-7-8.77v2.06c2.89.86 5 3.54 5 6.71zM4.27 3L3 4.27 7.73 9H3v6h4l5 5v-6.73l4.25 4.25c-.67.52-1.42.93-2.25 1.18v2.06c1.38-.31 2.63-.95 3.69-1.81L19.73 21 21 19.73l-9-9L4.27 3zM12 4L9.91 6.09 12 8.18V4z"></path></g>
+  <g id="volume-up"><path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3c0-1.77-1.02-3.29-2.5-4.03v8.05c1.48-.73 2.5-2.25 2.5-4.02zM14 3.23v2.06c2.89.86 5 3.54 5 6.71s-2.11 5.85-5 6.71v2.06c4.01-.91 7-4.49 7-8.77s-2.99-7.86-7-8.77z"></path></g>
+</defs></svg>
+</iron-iconset-svg>
+
 <dom-module id="route-controls">
   <link rel="import" type="css" href="../../media_router_common.css">
   <link rel="import" type="css" href="route_controls.css">

chrome/browser/resources/media_router/elements/route_controls/route_controls.js

@@ -254,7 +254,8 @@ Polymer({
    * @private
    */
   getMuteUnmuteIcon_: function(routeStatus) {
-    return routeStatus.isMuted ? 'av:volume-off' : 'av:volume-up';
+    return routeStatus.isMuted ? 'route-controls:volume-off' :
+                                 'route-controls:volume-up';
   },
 
   /**
@@ -274,8 +275,8 @@ Polymer({
    */
   getPlayPauseIcon_: function(routeStatus) {
     return routeStatus.playState === media_router.PlayState.PAUSED ?
-        'av:play-arrow' :
-        'av:pause';
+        'route-controls:play-arrow' :
+        'route-controls:pause';
   },
 
   /**