Rework library and class view pages.

runtime/bin/vmservice/client/lib/src/elements/class_view.dart

Index: runtime/bin/vmservice/client/lib/src/elements/class_view.dart
diff --git a/runtime/bin/vmservice/client/lib/src/elements/class_view.dart b/runtime/bin/vmservice/client/lib/src/elements/class_view.dart
index fd53d208f81a049e4abf36089f768f6f1d91e701..8c351687041aea71fcc36a07347ead8d54de0ffe 100644
--- a/runtime/bin/vmservice/client/lib/src/elements/class_view.dart
+++ b/runtime/bin/vmservice/client/lib/src/elements/class_view.dart
@@ -4,6 +4,7 @@
 
 library class_view_element;
 
+import 'dart:async';
 import 'observatory_element.dart';
 import 'package:observatory/service.dart';
 import 'package:polymer/polymer.dart';
@@ -13,7 +14,12 @@ class ClassViewElement extends ObservatoryElement {
   @published ServiceMap cls;
   ClassViewElement.created() : super.created();
 
+  Future<ServiceObject> eval(String text) {
+    return cls.isolate.get(
+        cls.id + "/eval?expr=${Uri.encodeComponent(text)}");
+  }
+
   void refresh(var done) {
     cls.reload().whenComplete(done);
   }
-}
+}