pkg/docgen: moved model classes into minilibs

pkg/docgen/lib/src/models/generic.dart

+// Copyright (c) 2014, 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 docgen.models.generic;
+
+import '../exports/source_mirrors.dart';
+import '../exports/mirrors_util.dart' as dart2js_util;
+
+import 'mirror_based.dart';
+
+/// A Docgen wrapper around the dart2js mirror for a generic type.
+class Generic extends MirrorBased<TypeVariableMirror> {
+  final TypeVariableMirror mirror;
+
+  Generic(this.mirror);
+
+  Map toMap() => {
+    'name': dart2js_util.nameOf(mirror),
+    'type': dart2js_util.qualifiedNameOf(mirror.upperBound)
+  };
+}