Remove Enqueuer argument from Backend.registerStaticUse

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

 // Copyright (c) 2015, 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.
 
 /// Analysis to determine how to generate code for `LookupMap`s.
 library compiler.src.js_backend.lookup_map_analysis;
 
 import 'package:pub_semver/pub_semver.dart';
 
 import '../common.dart';
@@ skipping 110 matching lines @@
   /// entry with that key.
   final _pending = <ConstantValue, List<_LookupMapInfo>>{};
 
   final StagedWorldImpactBuilder impactBuilder = new StagedWorldImpactBuilder();
 
   /// Whether the backend is currently processing the codegen queue.
   bool _inCodegen = false;
 
   LookupMapAnalysis(this.backend, this.reporter);
 
-  void onQueueEmpty(Enqueuer enqueuer) {
-    if (enqueuer.isResolutionQueue) return;
-    enqueuer.applyImpact(null, impactBuilder.flush());
+  /// Compute the [WorldImpact] for the constants registered since last flush.
+  WorldImpact flush({bool forResolution}) {
+    if (forResolution) return const WorldImpact();
+    return impactBuilder.flush();
   }
 
   /// Whether this analysis and optimization is enabled.
   bool get _isEnabled {
     // `lookupMap==off` kept here to make it easy to test disabling this feature
     if (const String.fromEnvironment('lookupMap') == 'off') return false;
     return typeLookupMapClass != null;
   }
 
   /// Initializes this analysis by providing the resolved library. This is
@@ skipping 295 matching lines @@
         original.fields[analysis.valueField] = keyValuePairs[1];
       }
     } else {
       original.fields[analysis.entriesField] =
           new ListConstantValue(listType, keyValuePairs);
     }
   }
 }
 
 final _validLookupMapVersionConstraint = new VersionConstraint.parse('^0.0.1');