Remove classMembers getter.

pkg/front_end/lib/src/fasta/kernel/kernel_library_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.kernel_library_builder;
 
 import 'package:kernel/ast.dart';
 
 import 'package:kernel/clone.dart' show CloneVisitor;
 
@@ skipping 83 matching lines @@
   }
 
   void addClass(
       List<MetadataBuilder> metadata,
       int modifiers,
       String className,
       List<TypeVariableBuilder> typeVariables,
       KernelTypeBuilder supertype,
       List<KernelTypeBuilder> interfaces,
       int charOffset) {
+    assert(currentDeclaration.parent == libraryDeclaration);
+    Map<String, MemberBuilder> members = currentDeclaration.members;
     ClassBuilder cls = new SourceClassBuilder(
         metadata,
         modifiers,
         className,
         typeVariables,
         supertype,
         interfaces,
-        classMembers,
+        members,
         this,
         new List<ConstructorReferenceBuilder>.from(constructorReferences),
         charOffset);
     constructorReferences.clear();
-    classMembers.forEach((String name, MemberBuilder builder) {
+    members.forEach((String name, MemberBuilder builder) {
       while (builder != null) {
         builder.parent = cls;
         builder = builder.next;
       }
     });
     // Nested declaration began in `OutlineBuilder.beginClassDeclaration`.
     endNestedDeclaration().resolveTypes(typeVariables, this);
     addBuilder(className, cls, charOffset);
   }
 
@@ skipping 387 matching lines @@
   }
 }
 
 bool isConstructorName(String name, String className) {
   if (name.startsWith(className)) {
     if (name.length == className.length) return true;
     if (name.startsWith(".", className.length)) return true;
   }
   return false;
 }