Improve script display in the observatory.

runtime/bin/vmservice/client/lib/src/app/pane.dart

Index: runtime/bin/vmservice/client/lib/src/app/pane.dart
diff --git a/runtime/bin/vmservice/client/lib/src/app/pane.dart b/runtime/bin/vmservice/client/lib/src/app/pane.dart
index e99906417672657c97e5ab6957f43b543453f98c..6daf449e5b9e27be4916e7a13167b4605d7126a3 100644
--- a/runtime/bin/vmservice/client/lib/src/app/pane.dart
+++ b/runtime/bin/vmservice/client/lib/src/app/pane.dart
@@ -27,7 +27,7 @@ abstract class Pane extends Observable {
 
   /// Called when the pane should update its state based on [url].
   /// NOTE: Only called when the pane is installed.
-  void visit(String url);
+  void visit(String url, Map args);
 
   /// Called to test whether this pane can visit [url].
   bool canVisit(String url);
@@ -44,7 +44,7 @@ class ServiceObjectPane extends Pane {
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     if (url == '') {
@@ -55,6 +55,7 @@ class ServiceObjectPane extends Pane {
     app.vm.get(url).then((obj) {
       ServiceObjectViewElement pane = element;
       pane.object = obj;
+      pane.args = toObservable(args);
     }).catchError((e) {
       Logger.root.severe('ServiceObjectPane visit error: $e');
     });
@@ -76,7 +77,7 @@ class ClassTreePane extends Pane {
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     // ClassTree urls are 'class-tree/isolate-id', chop off prefix, leaving
@@ -108,7 +109,7 @@ class ErrorViewPane extends Pane {
     }
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
     (element as ServiceObjectViewElement).object = app.lastErrorOrException;
@@ -127,7 +128,7 @@ class VMConnectPane extends Pane {
     assert(element != null);
   }
 
-  void visit(String url) {
+  void visit(String url, Map args) {
     assert(element != null);
     assert(canVisit(url));
   }