Extract InterceptorData from JavaScriptBackend.

pkg/compiler/lib/src/js_emitter/program_builder/collector.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.
 
 part of dart2js.js_emitter.program_builder;
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
  * in classes) are ignored, since they can be treated as non-class elements.
  *
@@ skipping 60 matching lines @@
     if (backend.isTreeShakingDisabled) return (ClassElement cls) => true;
 
     Set<ClassElement> unneededClasses = new Set<ClassElement>();
     // The [Bool] class is not marked as abstract, but has a factory
     // constructor that always throws. We never need to emit it.
     unneededClasses.add(commonElements.boolClass);
 
     // Go over specialized interceptors and then constants to know which
     // interceptors are needed.
     Set<ClassElement> needed = new Set<ClassElement>();
-    backend.specializedGetInterceptors
+    backend.interceptorData.specializedGetInterceptors
         .forEach((_, Iterable<ClassElement> elements) {
       needed.addAll(elements);
     });
 
     // Add interceptors referenced by constants.
     needed.addAll(computeInterceptorsReferencedFromConstants());
 
     // Add unneeded interceptors to the [unneededClasses] set.
-    for (ClassElement interceptor in backend.interceptedClasses) {
+    for (ClassElement interceptor
+        in backend.interceptorData.interceptedClasses) {
       if (!needed.contains(interceptor) &&
           interceptor != commonElements.objectClass) {
         unneededClasses.add(interceptor);
       }
     }
 
     // These classes are just helpers for the backend's type system.
     unneededClasses.add(helpers.jsMutableArrayClass);
     unneededClasses.add(helpers.jsFixedArrayClass);
     unneededClasses.add(helpers.jsExtendableArrayClass);
@@ skipping 135 matching lines @@
       neededClasses.add(commonElements.boolClass);
     }
     if (neededClasses.contains(helpers.jsArrayClass)) {
       neededClasses.add(commonElements.listClass);
     }
 
     // 4. Finally, sort the classes.
     List<ClassElement> sortedClasses = Elements.sortedByPosition(neededClasses);
 
     for (ClassElement element in sortedClasses) {
-      if (backend.isNativeOrExtendsNative(element) &&
+      if (backend.nativeData.isNativeOrExtendsNative(element) &&
           !classesOnlyNeededForRti.contains(element)) {
         // For now, native classes and related classes cannot be deferred.
         nativeClassesAndSubclasses.add(element);
         assert(
             invariant(element, !compiler.deferredLoadTask.isDeferred(element)));
         outputClassLists
             .putIfAbsent(compiler.deferredLoadTask.mainOutputUnit,
                 () => new List<ClassElement>())
             .add(element);
       } else {
@@ skipping 64 matching lines @@
   }
 
   void collect() {
     computeNeededDeclarations();
     computeNeededConstants();
     computeNeededStatics();
     computeNeededStaticNonFinalFields();
     computeNeededLibraries();
   }
 }