DevTools: convert a few more icons to UI.Icon.

third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js

Index: third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js
diff --git a/third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js b/third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js
index cb7fe590c27e7ccb3ea080ed418494a4d7357b59..437a4ed353ce634f184987612aba42fd6bcaf285 100644
--- a/third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js
+++ b/third_party/WebKit/Source/devtools/front_end/console/ConsoleViewMessage.js
@@ -312,7 +312,10 @@ Console.ConsoleViewMessage = class {
     var contentElement = toggleElement.createChild('div', 'console-message-stack-trace-wrapper');
 
     var messageElement = this._buildMessage(consoleMessage);
+    var icon = UI.Icon.create('smallicon-triangle-right', 'stack-trace-expand-icon');
     var clickableElement = contentElement.createChild('div');
+    clickableElement.appendChild(icon);
+
     clickableElement.appendChild(messageElement);
     var stackTraceElement = contentElement.createChild('div');
     var stackTracePreview =
@@ -324,8 +327,8 @@ Console.ConsoleViewMessage = class {
      * @param {boolean} expand
      */
     function expandStackTrace(expand) {
+      icon.setIconType(expand ? 'smallicon-triangle-bottom' : 'smallicon-triangle-right');
       stackTraceElement.classList.toggle('hidden', !expand);
-      toggleElement.classList.toggle('expanded', expand);
     }
 
     /**