Restore highlighting for current position.

runtime/observatory/lib/src/elements/script_inset.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library script_inset_element;
 
 import 'dart:async';
 import 'dart:html';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
 
 const nbsp = "\u00A0";
 
 class Annotation {
   int line;
   int columnStart;
   int columnStop;
   String title;
 
   void applyStyleTo(element) {
-    element.style.color = "blue";
-    element.style.textDecoration = "underline";
+    element.classes.add("currentCol");
     element.title = title;
   }
 }
 
 /// Box with script source code in it.
 @CustomTag('script-inset')
 class ScriptInsetElement extends ObservatoryElement {
   @published Script script;
 
   /// Set the height to make the script inset scroll.  Otherwise it
@@ skipping 202 matching lines @@
 
     return e;
   }
 
   Element lineSourceElement(ScriptLine line) {
     var e = new DivElement();
     e.classes.add("sourceItem");
 
     if (line != null) {
       if (line.line == currentLine) {
-        e.classes.add("sourceItemCurrent");
+        e.classes.add("currentLine");
       }
 
       e.id = makeLineId(line.line);
 
       var position = 0;
       consumeUntil(var stop) {
         if (stop <= position) {
           return;  // Empty gap between annotations/boundries.
         }
         var chunk = line.text.substring(position, stop);
@@ skipping 36 matching lines @@
     } else {
       // Existing breakpoint.  Remove it.
       line.script.isolate.removeBreakpoint(line.bpt).then((_) {
           busy = false;
       });
     }
   }
 
   BreakpointToggleElement.created() : super.created();
 }