Support call operator in the vm.

runtime/vm/dart_entry.cc

Index: runtime/vm/dart_entry.cc
===================================================================
--- runtime/vm/dart_entry.cc	(revision 16007)
+++ runtime/vm/dart_entry.cc	(working copy)
@@ -106,7 +106,7 @@
   for (int i = 1; i < num_arguments; i++) {
     args.Add(arguments[i - 1]);
   }
-  // Now Call the invoke stub which will invoke the closure.
+  // Now call the invoke stub which will invoke the closure.
   invokestub entrypoint = reinterpret_cast<invokestub>(
       StubCode::InvokeDartCodeEntryPoint());
   ASSERT(context.isolate() == Isolate::Current());