DevTools: migrate icons in "search across files" to UI.Icon

third_party/WebKit/Source/devtools/front_end/sources/sourcesSearch.css

 /*
  * Copyright 2014 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.
  */
 
 .search-drawer-header {
     flex: none;
     display: flex;
     border-bottom: 2px solid #e8e8e8;
     white-space: nowrap;
     overflow: hidden;
 }
 
 .search-drawer-header input.search-config-search {
     padding: 0 28px;
     margin: 1px 0px 1px 1px;
     height: 28px;
     border-radius: 2px;
     color: #303030;
     border: none;
     min-width: 95px;
 }
 
 .search-drawer-header .search-icon {
-    background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 168px;
-    background-position: -234px 138px;
     left: 10px;
     top: 10px;
-    width: 12px;
-    height: 12px;
     position: absolute;
 }
 
 .search-config-search::-webkit-search-cancel-button {
     -webkit-appearance: none;
 }
 
+.search-drawer-header .search-cancel-button-container {
+    position: relative;
+}
+
 .search-drawer-header .search-cancel-button {
-    position: relative;
-    left: -22px;
+    position: absolute;
+    right: 9px;
     top: 9px;
 }
 
-.search-drawer-header .search-cancel-button::before {
-    content: '';
-    background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 168px;
-    left: 0;
-    top: 0;
-    width: 13px;
-    height: 13px;
-    background-position: -143px -96px;
-    position: absolute;
-}
-
 :host-context(.platform-mac) .search-drawer-header input.search-config-search {
     top: 1px;
 }
 
 .search-drawer-header label.search-config-label:first-of-type {
     border-left: 1px solid #dadada;
     margin: 0px 0px 0px 1px;
     padding-left: 10px;
 }
 
@@ skipping 14 matching lines @@
 }
 
 .search-toolbar-summary .search-message {
     padding-top: 2px;
     padding-left: 1ex;
     text-overflow: ellipsis;
     white-space: nowrap;
     overflow: hidden;
 }
 
-@media (-webkit-min-device-pixel-ratio: 1.1) {
-.search-drawer-header .search-icon {
-    background-image: url(Images/toolbarButtonGlyphs_2x.png);
-}
-
-.search-drawer-header .search-cancel-button::before {
-    background-image: url(Images/toolbarButtonGlyphs_2x.png);
-}
-} /* media */
-
 .search-view .search-results {
     overflow-y: auto;
     display: flex;
     flex: auto;
 }
 
 .search-view .search-results > div {
     flex: auto;
 }
 
 .search-results .empty-view {
     pointer-events: none;
 }
 
 .empty-view {
     font-size: 24px;
     color: rgb(75%, 75%, 75%);
     font-weight: bold;
     padding: 10px;
     display: flex;
     align-items: center;
     justify-content: center;
 }