Remove use of Element in ResolutionEnqueuerListener.

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 10c38e34390417fc9c398f6d90e14ac70aa572bc..2a2fa48bc45a34892563049b25d2bbf3b0838c3b 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -37,6 +37,7 @@ import 'elements/resolution_types.dart'
     show
         ResolutionDartType,
         ResolutionDynamicType,
+        ResolutionFunctionType,
         ResolutionInterfaceType,
         Types;
 import 'enqueue.dart' show Enqueuer, EnqueueTask, ResolutionEnqueuer;
@@ -1968,4 +1969,25 @@ class _CompilerElementEnvironment implements ElementEnvironment {
     }
     return library;
   }
+
+  @override
+  CallStructure getCallStructure(MethodElement method) {
+    ResolutionFunctionType type = method.computeType(_resolution);
+    return new CallStructure(
+        type.parameterTypes.length +
+            type.optionalParameterTypes.length +
+            type.namedParameterTypes.length,
+        type.namedParameters);
+  }
+
+  @override
+  bool isDeferredLoadLibraryGetter(MemberElement member) {
+    return member.isDeferredLoaderGetter;
+  }
+
+  @override
+  ResolutionFunctionType getFunctionType(MethodElement method) {
+    method.computeType(_resolution);
+    return method.type;
+  }
 }