DevTools: migrate navigator icons to UI.Icon

third_party/WebKit/Source/devtools/front_end/ui/inspectorCommon.css

 /*
  * Copyright 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 * {
     /* This is required for correct sizing of flex items because we rely
      * on an old version of the flexbox spec.
      * Longer-term we should remove this, see crbug.com/473625 */
@@ skipping 333 matching lines @@
 .spritesheet-largeicons:not(.icon-mask) {
     background-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
     background-size: 352px 168px;
 }
 
 .spritesheet-largeicons.icon-mask {
     -webkit-mask-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
     -webkit-mask-size: 352px 168px;
 }
 
-.force-white-icons .spritesheet-smallicons, .force-white-icons.spritesheet-smallicons {
+.force-white-icons [is=ui-icon].spritesheet-smallicons, [is=ui-icon].force-white-icons.spritesheet-smallicons {
     -webkit-mask-image: -webkit-image-set(url(Images/smallIcons.png) 1x, url(Images/smallIcons_2x.png) 2x);
     -webkit-mask-size: 190px 30px;
     background-image: unset;
     background-size: unset;
+    background: unset;
     background-color: white;
 }
 
-.force-white-icons .spritesheet-largeicons, .force-white-icons.spritesheet-largeicons {
+.force-white-icons [is=ui-icon].spritesheet-largeicons, [is=ui-icon].force-white-icons.spritesheet-largeicons {
     -webkit-mask-image: -webkit-image-set(url(Images/toolbarButtonGlyphs.png) 1x, url(Images/toolbarButtonGlyphs_2x.png) 2x);
     -webkit-mask-size: 352px 168px;
     background-image: unset;
     background-size: unset;
+    background: unset;
     background-color: white;
 }