dart2js cps: Set the return type on adapters.

pkg/compiler/lib/src/cps_ir/inline.dart

Index: pkg/compiler/lib/src/cps_ir/inline.dart
diff --git a/pkg/compiler/lib/src/cps_ir/inline.dart b/pkg/compiler/lib/src/cps_ir/inline.dart
index 87892d3a1fe888ce912bfbe58baa9ef96d9bd7d7..32c2f0b02f9a6490aad502bc013acec5b7daac7f 100644
--- a/pkg/compiler/lib/src/cps_ir/inline.dart
+++ b/pkg/compiler/lib/src/cps_ir/inline.dart
@@ -374,6 +374,7 @@ class InliningVisitor extends TrampolineRecursiveVisitor {
     Primitive result = cps.invokeMethod(thisParameter, newSelector, node.mask,
         arguments, node.callingConvention);
     result.type = typeSystem.getInvokeReturnType(node.selector, node.mask);
+    returnContinuation.parameters.single.type = result.type;
     cps.invokeContinuation(returnContinuation, <Primitive>[result]);
     return new FunctionDefinition(target, thisParameter, parameters,
         returnContinuation,