Add pause/resume for isolates in vmservice/observatory.

runtime/bin/vmservice/client/lib/src/elements/isolate_view.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_view_element;
 
 import 'dart:async';
 import 'observatory_element.dart';
 import 'package:observatory/app.dart';
 import 'package:observatory/service.dart';
@@ skipping 103 matching lines @@
     var element = shadowRoot.querySelector('#tagProfileChart');
     if (element != null) {
       tagProfileChart.draw(element);
     }
   }
 
   void refresh(var done) {
     isolate.reload().whenComplete(done);
   }
 
-  void resume(var a, var b, var c) {
-    isolate.get("resume").then((result) {
-      // TODO(turnidge): Instead of asserting here, handling errors
-      // properly.
-      assert(result.serviceType == 'Success');
-      isolate.reload();
-    });
+  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();
+      });
+  }
+
+  Future resume(_) {
+    return isolate.get("resume").then((result) {
+        // TODO(turnidge): Instead of asserting here, handle errors
+        // properly.
+        assert(result.serviceType == 'Success');
+        return isolate.reload();
+      });
   }
 }