Rename fletch -> dartino

pkg/fletchc/lib/incremental_backend.dart

-// Copyright (c) 2015, the Dartino 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.md file.
-
-library fletchc.incremental_backend;
-
-import 'package:compiler/src/elements/elements.dart' show
-    Element,
-    FieldElement,
-    FunctionElement;
-
-import 'fletch_system.dart' show
-    FletchSystem;
-
-import 'src/fletch_system_builder.dart' show
-    FletchSystemBuilder;
-
-import 'src/fletch_context.dart' show
-    FletchContext;
-
-// TODO(ahe): Move this to dart2js upstream when it's stabilized
-abstract class IncrementalBackend {
-
-  /// Remove [element] from the compilation result. Called after resolution and
-  /// codegen phase.
-  ///
-  /// This is different from [Backend.forgetElement] which is about preparing
-  /// for a new round of resolution and codegen. `forgetElement` is called
-  /// before processing the work queue, this method is called after and the old
-  /// version of [element] should be removed.
-  void removeFunction(FunctionElement element);
-
-  /// Remove [element] from the compilation result. Called after resolution and
-  /// codegen phase.
-  ///
-  /// See [removeFunction] for how this compares to `forgetElement`.
-  void removeField(FieldElement element);
-
-  /// Register that [element] is now part of the compilation. This happens
-  /// during the codegen phase.
-  // TODO(ahe): We should probably remove this API, I believe it is an artifact
-  // of the incremental compiler not enqueuing fields.
-  void newElement(Element element);
-
-  /// Update references to [element] in [users].
-  // TODO(ahe): Computing [users] is expensive, and may not be necessary in
-  // dart2js. Move to IncrementalFletchBackend or add a bool to say if the call
-  // is needed.
-  void replaceFunctionUsageElement(Element element, List<Element> users);
-}
-
-abstract class IncrementalFletchBackend implements IncrementalBackend {
-  FletchSystemBuilder get systemBuilder;
-
-  void newSystemBuilder(FletchSystem predecessorSystem);
-
-  /// In Fletch, assembleProgram is incremental. In dart2js it isn't.
-  int assembleProgram();
-}