Pay some naming debt.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_interface_type_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_interface_type_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_interface_type_builder.dart
deleted file mode 100644
index ffbe6cb2cfbce3a1d75e545a2503c944cb7c11f6..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_interface_type_builder.dart
+++ /dev/null
@@ -1,94 +0,0 @@
-// 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_interface_type_builder;
-
-import 'package:kernel/ast.dart' show
-    DartType,
-    DynamicType,
-    Supertype,
-    VoidType;
-
-import '../errors.dart' show
-    inputError;
-
-import 'kernel_builder.dart' show
-    InterfaceTypeBuilder,
-    KernelClassBuilder,
-    KernelInvalidTypeBuilder,
-    KernelTypeBuilder,
-    TypeBuilder,
-    TypeDeclarationBuilder,
-    TypeVariableBuilder;
-
-// TODO(ahe): This isn't really an interface type. Find better name, for
-// example, KernelNamedTypeBuilder.
-class KernelInterfaceTypeBuilder extends InterfaceTypeBuilder<KernelTypeBuilder>
-    implements KernelTypeBuilder {
-  TypeDeclarationBuilder<KernelTypeBuilder, DartType> builder;
-
-  KernelInterfaceTypeBuilder(String name, List<KernelTypeBuilder> arguments)
-      : super(name, arguments);
-
-  KernelInvalidTypeBuilder buildInvalidType(String name) {
-    // TODO(ahe): Report error somewhere.
-    print("Type not found: $name");
-    return new KernelInvalidTypeBuilder(name, null);
-  }
-
-  DartType handleMissingType() {
-    // TODO(ahe): Fix this.
-    print("No type for: $name");
-    return const DynamicType();
-  }
-
-  Supertype handleMissingSuperType() {
-    // TODO(ahe): Fix this.
-    return inputError(null, null, "No type for: $name");
-  }
-
-  DartType build() {
-    if (name == "void") return const VoidType();
-    if (name == "dynamic") return const DynamicType();
-    if (builder == null) return handleMissingType();
-    return builder.buildType(arguments);
-  }
-
-  Supertype buildSupertype() {
-    if (name == "void") return null;
-    if (name == "dynamic") return null;
-    if (builder == null) return handleMissingSuperType();
-    if (builder is KernelClassBuilder) {
-      KernelClassBuilder builder = this.builder;
-      return builder.buildSupertype(arguments);
-    } else {
-      return handleMissingSuperType();
-    }
-  }
-
-  TypeBuilder subst(Map<TypeVariableBuilder, TypeBuilder> substitution) {
-    assert(builder != null);
-    TypeBuilder result = substitution[builder];
-    if (result != null) {
-      assert(builder is TypeVariableBuilder);
-      return result;
-    } else if (arguments != null) {
-      List<KernelTypeBuilder> arguments;
-      int i = 0;
-      for (KernelTypeBuilder argument in this.arguments) {
-        KernelTypeBuilder type = argument.subst(substitution);
-        if (type != argument) {
-          arguments ??= this.arguments.toList();
-          arguments[i] = type;
-        }
-        i++;
-      }
-      if (arguments != null) {
-        return new KernelInterfaceTypeBuilder(name, arguments)
-            ..builder = builder;
-      }
-    }
-    return this;
-  }
-}