Remove invalidated elements from enqueuer and resolution.

pkg/compiler/lib/src/compiler.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.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'cache_strategy.dart' show CacheStrategy;
@@ skipping 1190 matching lines @@
       int slashPos = libraryUri.path.indexOf('/');
       if (slashPos != -1) {
         String packageName = libraryUri.path.substring(0, slashPos);
         return new Uri(scheme: 'package', path: packageName);
       }
     }
     return libraryUri;
   }
 
   void forgetElement(Element element) {
+    resolution.forgetElement(element);
     enqueuer.forgetElement(element);
     if (element is MemberElement) {
       for (Element closure in element.nestedClosures) {
         // TODO(ahe): It would be nice to reuse names of nested closures.
         closureToClassMapper.forgetElement(closure);
       }
     }
     backend.forgetElement(element);
   }
 
@@ skipping 748 matching lines @@
   @override
   ResolutionWorkItem createWorkItem(
       Element element, ItemCompilationContext compilationContext) {
     if (compiler.serialization.isDeserialized(element)) {
       return compiler.serialization
           .createResolutionWorkItem(element, compilationContext);
     } else {
       return new ResolutionWorkItem(element, compilationContext);
     }
   }
+
+  @override
+  void forgetElement(Element element) {
+    _worldImpactCache.remove(element);
+    _resolutionImpactCache.remove(element);
+  }
 }
 
 class GlobalDependencyRegistry extends EagerRegistry {
   final Compiler compiler;
   Setlet<Element> _otherDependencies;
 
   GlobalDependencyRegistry(this.compiler) : super('GlobalDependencies', null);
 
   // TODO(johnniwinther): Rename world/universe/enqueuer through out the
   // compiler.
@@ skipping 26 matching lines @@
   _ElementScanner(this.scanner);
   void scanLibrary(LibraryElement library) => scanner.scanLibrary(library);
   void scanUnit(CompilationUnitElement unit) => scanner.scan(unit);
 }
 
 class _EmptyEnvironment implements Environment {
   const _EmptyEnvironment();
 
   String valueOf(String key) => null;
 }