Add optional message to assert in Dart2js - continued

pkg/compiler/lib/src/common/codegen.dart

Index: pkg/compiler/lib/src/common/codegen.dart
diff --git a/pkg/compiler/lib/src/common/codegen.dart b/pkg/compiler/lib/src/common/codegen.dart
index 323822b1f470af3b979468aa28a9c3f34b3cbaf3..7b69c3c3f3550d295625d35e732830fef3fe7b0c 100644
--- a/pkg/compiler/lib/src/common/codegen.dart
+++ b/pkg/compiler/lib/src/common/codegen.dart
@@ -56,6 +56,11 @@ class CodegenRegistry extends Registry {
   CodegenEnqueuer get world => compiler.enqueuer.codegen;
   JavaScriptBackend get backend => compiler.backend;
 
+  void registerAssert(bool hasMessage) {
+    // Codegen does not register asserts.  They have been lowered to calls.
+    assert(false);
+  }
+
   void registerDependency(Element element) {
     treeElements.registerDependency(element);
   }