Revert "Add optional message to assert in Dart2js - continued"

pkg/compiler/lib/src/resolution/registry.dart

Index: pkg/compiler/lib/src/resolution/registry.dart
diff --git a/pkg/compiler/lib/src/resolution/registry.dart b/pkg/compiler/lib/src/resolution/registry.dart
index 64089c0681d03d461483dff61c449a7f16645320..043c5cd56cefcd7ed06c8f1808209119dad78e3a 100644
--- a/pkg/compiler/lib/src/resolution/registry.dart
+++ b/pkg/compiler/lib/src/resolution/registry.dart
@@ -54,11 +54,6 @@ class EagerRegistry implements Registry {
   Iterable<Element> get otherDependencies => mapping.otherDependencies;
 
   @override
-  void registerAssert(bool hasMessage) {
-    // TODO(johnniwinther): Do something here?
-  }
-
-  @override
   void registerDependency(Element element) {
     mapping.registerDependency(element);
   }
@@ -583,8 +578,13 @@ class ResolutionRegistry implements Registry {
     world.registerInstantiatedType(type, this);
   }
 
-  void registerAssert(bool hasMessage) {
-    backend.resolutionCallbacks.onAssert(hasMessage, this);
+  void registerAssert(Send node) {
+    mapping.setAssert(node);
+    backend.resolutionCallbacks.onAssert(node, this);
+  }
+
+  bool isAssert(Send node) {
+    return mapping.isAssert(node);
   }
 
   void registerSendStructure(Send node, SendStructure sendStructure) {