Make selector registration in the resolver and code generator more explicit.

lib/compiler/implementation/ssa/builder.dart

Index: lib/compiler/implementation/ssa/builder.dart
diff --git a/lib/compiler/implementation/ssa/builder.dart b/lib/compiler/implementation/ssa/builder.dart
index 3eb295d1827b7ce550294162b1f1e21646ef6ae2..4720ed14eb6c32b020ca704f7c21c123005d7fc7 100644
--- a/lib/compiler/implementation/ssa/builder.dart
+++ b/lib/compiler/implementation/ssa/builder.dart
@@ -2165,7 +2165,7 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
       // If the isolate library is not used, we just invoke the
       // closure.
       visit(link.tail.head);
-      Selector selector = new Selector.callAny(0);
+      Selector selector = new Selector.callClosure(0);
       push(new HInvokeClosure(selector, <HInstruction>[pop()]));
     } else {
       // Call a helper method from the isolate library.
@@ -2205,7 +2205,7 @@ class SsaBuilder extends ResolvedVisitor implements Visitor {
     visit(closure);
     List<HInstruction> inputs = <HInstruction>[pop()];
     String invocationName = compiler.namer.closureInvocationName(
-        new Selector.callAny(params.requiredParameterCount));
+        new Selector.callClosure(params.requiredParameterCount));
     push(new HForeign(new DartString.literal('#.$invocationName'),
                       const LiteralDartString('var'),
                       inputs));