Add breakpoints and single-stepping to Observatory.

runtime/bin/vmservice/client/lib/src/elements/isolate_summary.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 isolate_summary_element;
 
 import 'dart:async';
 import 'observatory_element.dart';
 import 'package:observatory/app.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
 
 @CustomTag('isolate-summary')
 class IsolateSummaryElement extends ObservatoryElement {
   IsolateSummaryElement.created() : super.created();
 
   @published Isolate isolate;
 }
 
 @CustomTag('isolate-run-state')
 class IsolateRunStateElement extends ObservatoryElement {
   IsolateRunStateElement.created() : super.created();
 
   @published Isolate isolate;
 
   Future pause(_) {
-    return isolate.get("debug/pause").then((result) {
-        // TODO(turnidge): Instead of asserting here, handle errors
-        // properly.
-        assert(result.serviceType == 'Success');
-        return isolate.reload();
-      });
+    return isolate.pause();
   }
-
   Future resume(_) {
-    return isolate.get("debug/resume").then((result) {
-        // TODO(turnidge): Instead of asserting here, handle errors
-        // properly.
-        assert(result.serviceType == 'Success');
-        app.removePauseEvents(isolate);
-        return isolate.reload();
-      });
+    app.removePauseEvents(isolate);
+    return isolate.resume();
+  }
+  Future stepInto(_) {
+    app.removePauseEvents(isolate);
+    return isolate.stepInto();
+  }
+  Future stepOver(_) {
+    app.removePauseEvents(isolate);
+    return isolate.stepOver();
+  }
+  Future stepOut(_) {
+    app.removePauseEvents(isolate);
+    return isolate.stepOut();
   }
 }
 
 @CustomTag('isolate-location')
 class IsolateLocationElement extends ObservatoryElement {
   IsolateLocationElement.created() : super.created();
 
   @published Isolate isolate;
 }
 
@@ skipping 51 matching lines @@
     chart.update(counters);
     var element = shadowRoot.querySelector('#counterPieChart');
     if (element != null) {
       chart.draw(element);
     }
   }
 }