Revert "Handle named mixin application in emitter"

pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
index 6fbcd72e97262acc82a99b4c3831a4f9952a2534..f1fbe6df79052d04964fb89d3731fca2e411b38c 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder/program_builder.dart
@@ -743,7 +743,7 @@ class ProgramBuilder {
 
     // MixinApplications run through the members of their mixin. Here, we are
     // only interested in direct members.
-    if (!onlyForRti && !_elementEnvironment.isMixinApplication(cls)) {
+    if (!onlyForRti && !_elementEnvironment.isUnnamedMixinApplication(cls)) {
       _elementEnvironment.forEachClassMember(cls, visitMember);
       if (cls is ClassElement) {
         // TODO(johnniwinther): Support constructor bodies for entities.
@@ -802,7 +802,7 @@ class ProgramBuilder {
         _worldBuilder.directlyInstantiatedClasses.contains(cls);
 
     Class result;
-    if (_elementEnvironment.isMixinApplication(cls) && !onlyForRti) {
+    if (_elementEnvironment.isUnnamedMixinApplication(cls) && !onlyForRti) {
       assert(!_nativeData.isNativeClass(cls));
       assert(methods.isEmpty);
       assert(!isClosureBaseClass);