Remove BackendClasses and JavaScriptBackendClasses.

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

 // Copyright (c) 2013, 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.
 
-import '../common/backend_api.dart';
 import '../common/resolution.dart';
 import '../common_elements.dart';
 import '../constants/constant_system.dart';
 import '../constants/values.dart';
 import '../elements/elements.dart';
 import '../elements/entities.dart';
 import '../elements/resolution_types.dart';
 import '../universe/call_structure.dart';
 import '../universe/use.dart' show ConstantUse, StaticUse;
 import '../universe/world_impact.dart'
@@ skipping 70 matching lines @@
   WorldImpact flush() => join.flush();
 }
 
 class CustomElementsResolutionAnalysis extends CustomElementsAnalysisBase {
   final CustomElementsAnalysisJoin join;
 
   CustomElementsResolutionAnalysis(
       Resolution resolution,
       ConstantSystem constantSystem,
       CommonElements commonElements,
-      BackendClasses backendClasses,
       NativeBasicData nativeData,
       BackendUsageBuilder backendUsageBuilder)
-      : join = new CustomElementsAnalysisJoin(resolution, constantSystem,
-            commonElements, backendClasses, nativeData,
+      : join = new CustomElementsAnalysisJoin(
+            resolution, constantSystem, commonElements, nativeData,
             backendUsageBuilder: backendUsageBuilder),
         super(resolution, commonElements, nativeData) {
     // TODO(sra): Remove this work-around.  We should mark allClassesSelected in
     // both joins only when we see a construct generating an unknown [Type] but
     // we can't currently recognize all cases.  In particular, the work-around
     // for the unimplemented `ClassMirror.reflectedType` is not recognizable.
     // TODO(12607): Match on [ClassMirror.reflectedType]
     join.allClassesSelected = true;
   }
 
@@ skipping 12 matching lines @@
   }
 }
 
 class CustomElementsCodegenAnalysis extends CustomElementsAnalysisBase {
   final CustomElementsAnalysisJoin join;
 
   CustomElementsCodegenAnalysis(
       Resolution resolution,
       ConstantSystem constantSystem,
       CommonElements commonElements,
-      BackendClasses backendClasses,
       NativeBasicData nativeData)
-      : join = new CustomElementsAnalysisJoin(resolution, constantSystem,
-            commonElements, backendClasses, nativeData),
+      : join = new CustomElementsAnalysisJoin(
+            resolution, constantSystem, commonElements, nativeData),
         super(resolution, commonElements, nativeData) {
     // TODO(sra): Remove this work-around.  We should mark allClassesSelected in
     // both joins only when we see a construct generating an unknown [Type] but
     // we can't currently recognize all cases.  In particular, the work-around
     // for the unimplemented `ClassMirror.reflectedType` is not recognizable.
     // TODO(12607): Match on [ClassMirror.reflectedType]
     join.allClassesSelected = true;
   }
 
   void registerTypeConstant(ClassElement element) {
     assert(element.isClass);
     join.selectedClasses.add(element);
   }
 
   bool get needsTable => join.demanded;
 
   bool needsClass(ClassElement classElement) =>
       join.activeClasses.contains(classElement);
 
   List<ConstructorElement> constructors(ClassElement classElement) =>
       join.computeEscapingConstructors(classElement);
 }
 
 class CustomElementsAnalysisJoin {
   final Resolution _resolution;
   final ConstantSystem _constantSystem;
   final CommonElements _commonElements;
-  final BackendClasses _backendClasses;
   final NativeBasicData _nativeData;
   final BackendUsageBuilder _backendUsageBuilder;
 
   final bool forResolution;
 
   final StagedWorldImpactBuilder impactBuilder = new StagedWorldImpactBuilder();
 
   // Classes that are candidates for needing constructors.  Classes are moved to
   // [activeClasses] when we know they need constructors.
   final instantiatedClasses = new Set<ClassElement>();
 
   // Classes explicitly named.
   final selectedClasses = new Set<ClassElement>();
 
   // True if we must conservatively include all extension classes.
   bool allClassesSelected = false;
 
   // Did we see a demand for the data?
   bool demanded = false;
 
   // ClassesOutput: classes requiring metadata.
   final activeClasses = new Set<ClassElement>();
 
   CustomElementsAnalysisJoin(this._resolution, this._constantSystem,
-      this._commonElements, this._backendClasses, this._nativeData,
+      this._commonElements, this._nativeData,
       {BackendUsageBuilder backendUsageBuilder})
       : this._backendUsageBuilder = backendUsageBuilder,
         this.forResolution = backendUsageBuilder != null;
 
   WorldImpact flush() {
     if (!demanded) return const WorldImpact();
     var newActiveClasses = new Set<ClassElement>();
     for (ClassElement classElement in instantiatedClasses) {
       bool isNative = _nativeData.isNativeClass(classElement);
       bool isExtension =
@@ skipping 21 matching lines @@
             .registerConstantUse(new ConstantUse.customElements(constant));
       }
     }
     activeClasses.addAll(newActiveClasses);
     instantiatedClasses.removeAll(newActiveClasses);
     return impactBuilder.flush();
   }
 
   TypeConstantValue _makeTypeConstant(ClassElement element) {
     ResolutionDartType elementType = element.rawType;
-    return _constantSystem.createType(
-        _commonElements, _backendClasses, elementType);
+    return _constantSystem.createType(_commonElements, elementType);
   }
 
   List<ConstructorElement> computeEscapingConstructors(
       ClassElement classElement) {
     List<ConstructorElement> result = <ConstructorElement>[];
     // Only classes that extend native classes have constructors in the table.
     // We could refine this to classes that extend Element, but that would break
     // the tests and there is no sane reason to subclass other native classes.
     if (_nativeData.isNativeClass(classElement)) return result;
 
     void selectGenerativeConstructors(ClassElement enclosing, Element member) {
       if (member.isGenerativeConstructor) {
         // Ignore constructors that cannot be called with zero arguments.
         ConstructorElement constructor = member;
         constructor.computeType(_resolution);
         FunctionSignature parameters = constructor.functionSignature;
         if (parameters.requiredParameterCount == 0) {
           result.add(member);
         }
       }
     }
 
     classElement.forEachMember(selectGenerativeConstructors,
         includeBackendMembers: false, includeSuperAndInjectedMembers: false);
     return result;
   }
 }