Fix a bug in the type inferrer, where a getter call was not seen as a potential closure call.

sdk/lib/_internal/compiler/implementation/inferrer/closure_tracer.dart

Index: sdk/lib/_internal/compiler/implementation/inferrer/closure_tracer.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/inferrer/closure_tracer.dart	(revision 31225)
+++ sdk/lib/_internal/compiler/implementation/inferrer/closure_tracer.dart	(working copy)
@@ -54,6 +54,11 @@
     if (called.isForeign(compiler) && called.name == 'JS') {
       bailout('Used in JS ${info.call}');
     }
+    if (inferrer.types.getInferredTypeOf(called) == currentUser) {
+      // This node can be a closure call as well. For example, `foo()`
+      // where `foo` is a getter.
+      analyzeCall(info);
+    }
   }
 
   bool checkIfCurrentUser(element) {