Handle named mixin application in emitter

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

Index: pkg/compiler/lib/src/resolution/resolution_strategy.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution_strategy.dart b/pkg/compiler/lib/src/resolution/resolution_strategy.dart
index c29092f2b3b938f5090efe9b0754c9090128d06e..070305be85a300997cb3b73fdcbb50cd934138db 100644
--- a/pkg/compiler/lib/src/resolution/resolution_strategy.dart
+++ b/pkg/compiler/lib/src/resolution/resolution_strategy.dart
@@ -408,11 +408,26 @@ class _CompilerElementEnvironment implements ElementEnvironment {
   }
 
   @override
+  bool isMixinApplication(ClassElement cls) {
+    return cls.isMixinApplication;
+  }
+
+  @override
   bool isUnnamedMixinApplication(ClassElement cls) {
     return cls.isUnnamedMixinApplication;
   }
 
   @override
+  ClassEntity getEffectiveMixinClass(ClassElement cls) {
+    if (!cls.isMixinApplication) return null;
+    do {
+      MixinApplicationElement mixinApplication = cls;
+      cls = mixinApplication.mixin;
+    } while (cls.isMixinApplication);
+    return cls;
+  }
+
+  @override
   ResolutionDartType getTypeVariableBound(TypeVariableElement typeVariable) {
     return typeVariable.bound;
   }