Remove code supporting incremental compilation in dart2js

pkg/compiler/lib/src/js_backend/enqueuer.dart

 // Copyright (c) 2012, 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 dart2js.js.enqueue;
 
 import 'dart:collection' show Queue;
 
-import '../cache_strategy.dart' show CacheStrategy;
 import '../common/backend_api.dart' show Backend;
 import '../common/codegen.dart' show CodegenWorkItem;
 import '../common/tasks.dart' show CompilerTask;
 import '../common/work.dart' show WorkItem;
 import '../common.dart';
-import '../compiler.dart' show Compiler;
 import '../elements/resolution_types.dart'
     show ResolutionDartType, ResolutionInterfaceType;
 import '../elements/elements.dart' show MemberElement, TypedElement;
 import '../elements/entities.dart';
 import '../enqueue.dart';
 import '../native/native.dart' as native;
 import '../options.dart';
 import '../types/types.dart' show TypeMaskStrategy;
 import '../universe/world_builder.dart';
 import '../universe/use.dart'
@@ skipping 18 matching lines @@
   final Backend _backend;
   final CompilerOptions _options;
 
   WorldImpactVisitor _impactVisitor;
 
   final Queue<WorkItem> _queue = new Queue<WorkItem>();
 
   /// All declaration elements that have been processed by codegen.
   final Set<Entity> _processedEntities = new Set<Entity>();
 
-  final Set<Entity> newlyEnqueuedElements;
-
-  final Set<DynamicUse> newlySeenSelectors;
-
   static const ImpactUseCase IMPACT_USE =
       const ImpactUseCase('CodegenEnqueuer');
 
-  CodegenEnqueuer(this.task, CacheStrategy cacheStrategy, Backend backend,
-      CompilerOptions options, this.strategy)
+  CodegenEnqueuer(
+      this.task, Backend backend, CompilerOptions options, this.strategy)
       : _universe =
             new CodegenWorldBuilderImpl(backend, const TypeMaskStrategy()),
         _workItemBuilder = new CodegenWorkItemBuilder(backend, options),
-        newlyEnqueuedElements = cacheStrategy.newSet(),
-        newlySeenSelectors = cacheStrategy.newSet(),
         nativeEnqueuer = backend.nativeCodegenEnqueuer(),
         this._backend = backend,
         this._options = options,
         this.name = 'codegen enqueuer' {
     _impactVisitor = new EnqueuerImplImpactVisitor(this);
   }
 
   CodegenWorldBuilder get worldBuilder => _universe;
 
   bool get queueIsEmpty => _queue.isEmpty;
 
   /// Returns [:true:] if this enqueuer is the resolution enqueuer.
   bool get isResolutionQueue => false;
 
   /// Create a [WorkItem] for [entity] and add it to the work list if it has not
   /// already been processed.
   void _addToWorkList(MemberEntity entity) {
     if (_processedEntities.contains(entity)) return;
 
     WorkItem workItem = _workItemBuilder.createWorkItem(entity);
     if (workItem == null) return;
 
-    if (_options.hasIncrementalSupport) {
-      newlyEnqueuedElements.add(entity);
-    }
-
     if (queueIsClosed) {
       throw new SpannableAssertionFailure(
           entity, "Codegen work list is closed. Trying to add $entity");
     }
 
     applyImpact(_backend.registerUsedElement(entity, forResolution: false));
     _queue.add(workItem);
   }
 
   void applyImpact(WorldImpact worldImpact, {var impactSource}) {
@@ skipping 51 matching lines @@
     if (useSet.contains(MemberUse.CLOSURIZE_INSTANCE)) {
       _registerClosurizedMember(member);
     }
     if (useSet.contains(MemberUse.CLOSURIZE_STATIC)) {
       applyImpact(_backend.registerGetOfStaticFunction());
     }
   }
 
   void processDynamicUse(DynamicUse dynamicUse) {
     task.measure(() {
-      if (_universe.registerDynamicUse(dynamicUse, _applyMemberUse)) {
-        if (_options.hasIncrementalSupport) {
-          newlySeenSelectors.add(dynamicUse);
-        }
-      }
+      _universe.registerDynamicUse(dynamicUse, _applyMemberUse);
     });
   }
 
   void processStaticUse(StaticUse staticUse) {
     _universe.registerStaticUse(staticUse, _applyMemberUse);
     switch (staticUse.kind) {
       case StaticUseKind.CONSTRUCTOR_INVOKE:
       case StaticUseKind.CONST_CONSTRUCTOR_INVOKE:
       case StaticUseKind.REDIRECTION:
         processTypeUse(new TypeUse.instantiation(staticUse.type));
@@ skipping 77 matching lines @@
 
   void logSummary(log(message)) {
     log('Compiled ${_processedEntities.length} methods.');
     nativeEnqueuer.logSummary(log);
   }
 
   String toString() => 'Enqueuer($name)';
 
   ImpactUseCase get impactUse => IMPACT_USE;
 
-  void forgetEntity(Entity entity, Compiler compiler) {
-    _universe.forgetElement(entity, compiler);
-    _processedEntities.remove(entity);
-  }
-
   @override
   Iterable<Entity> get processedEntities => _processedEntities;
 
   @override
   Iterable<ClassEntity> get processedClasses => _universe.processedClasses;
 }
 
 /// Builder that creates the work item necessary for the code generation of a
 /// [MemberElement].
 class CodegenWorkItemBuilder extends WorkItemBuilder {
@@ skipping 13 matching lines @@
     // code for checked setters.
     if (element.isField && element.isInstanceMember) {
       if (!_options.enableTypeAssertions ||
           element.enclosingElement.isClosure) {
         return null;
       }
     }
     return new CodegenWorkItem(_backend, element);
   }
 }