Pay some naming debt.

pkg/front_end/lib/src/fasta/builder/interface_type_builder.dart

Index: pkg/front_end/lib/src/fasta/builder/interface_type_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/interface_type_builder.dart b/pkg/front_end/lib/src/fasta/builder/interface_type_builder.dart
deleted file mode 100644
index cd34e65336a0a93f61aa75f5c36e6e0d63a5f249..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/fasta/builder/interface_type_builder.dart
+++ /dev/null
@@ -1,73 +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.interface_type_builder;
-
-import 'scope.dart' show
-    Scope;
-
-import 'builder.dart' show
-    Builder,
-    InvalidTypeBuilder,
-    PrefixBuilder,
-    TypeBuilder,
-    TypeDeclarationBuilder;
-
-// TODO(ahe): This isn't really an interface type. Find better name. Possibly,
-// `NamedTypeBuilder`.
-abstract class InterfaceTypeBuilder<T extends TypeBuilder> extends TypeBuilder {
-  final String name;
-
-  final List<T> arguments;
-
-  TypeDeclarationBuilder get builder;
-
-  void set builder(TypeDeclarationBuilder b);
-
-  InterfaceTypeBuilder(this.name, this.arguments);
-
-  InvalidTypeBuilder buildInvalidType(String name);
-
-  void bind(TypeDeclarationBuilder builder) {
-    this.builder = builder;
-  }
-
-  void resolveIn(Scope scope) {
-    Builder member = scope.lookup(name);
-    if (member is TypeDeclarationBuilder) {
-      builder = member;
-      return;
-    }
-    if (name.contains(".")) {
-      int index = name.lastIndexOf(".");
-      String first = name.substring(0, index);
-      String last = name.substring(name.lastIndexOf(".") + 1);
-      var prefix = scope.lookup(first);
-      if (prefix is PrefixBuilder) {
-        member = prefix.exports[last];
-      }
-      if (member is TypeDeclarationBuilder) {
-        builder = member;
-        return;
-      }
-    }
-    builder = buildInvalidType(name);
-  }
-
-  String get debugName => "InterfaceTypeBuilder";
-
-  StringBuffer printOn(StringBuffer buffer) {
-    buffer.write(name);
-    if (arguments == null) return buffer;
-    buffer.write("<");
-    bool first = true;
-    for (T t in arguments) {
-      if (!first) buffer.write(", ");
-      first = false;
-      t.printOn(buffer);
-    }
-    buffer.write(">");
-    return buffer;
-  }
-}