dart2js-kernel: Bind type variables in generative constructor.

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index 575ec8e7dd002b98e34e50684002a561ea8cc907..c52f3cc69a3c503173ec16c09d4f14d1cdc29997 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -133,6 +133,11 @@ class KernelAstAdapter extends KernelElementAdapterMixin {
     _resolvedAst = _resolvedAstStack.removeLast();
   }
 
+  void assertAtResolvedAstFor(ir.Node node) {
+    assert(invariant(getElement(node),
+        _resolvedAst.element == getElement(node).declaration));
+  }
+
   Compiler get _compiler => _backend.compiler;
   TreeElements get elements => _resolvedAst.elements;
   DiagnosticReporter get reporter => _compiler.reporter;