Fix some observatory analysis issues.

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

Index: runtime/observatory/lib/src/elements/instance_ref.dart
diff --git a/runtime/observatory/lib/src/elements/instance_ref.dart b/runtime/observatory/lib/src/elements/instance_ref.dart
index 7bbf3aebbb0c0d6094fd499f2398ce43fcef7b9b..e1a112ce439b992344bdfd3e2b5375f4c4ebb5b4 100644
--- a/runtime/observatory/lib/src/elements/instance_ref.dart
+++ b/runtime/observatory/lib/src/elements/instance_ref.dart
@@ -98,8 +98,7 @@ class InstanceRefElement extends HtmlElement implements Renderable {
     final button = new ButtonElement()..text = 'show next ${count}';
     button.onClick.listen((_) async {
       button.disabled = true;
-      _loadedInstance =
-          await _objects.get(_isolate, _instance.id, count: count * 2);

[rmacnak, 2017/06/01 19:30:46]

This parameter should instead be copied from InstanceRepository to
ObjectRepository

[devoncarew, 2017/06/01 20:11:54]

I'm not familiar w/ this code - can you provide more details?
ObjectRepository.get doesn't have a count param, and it's not totally clear to
me what the intention here is.

+      _loadedInstance = await _objects.get(_isolate, _instance.id);
       _r.dirty();
     });
     return [button];