Move hasRuntimeTypeSupport, hasIsolateSupport, and hasFunctionApplySupport to JavaScriptBackend.

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 162 matching lines @@
 
   /// The constant environment for the frontend interpretation of compile-time
   /// constants.
   ConstantEnvironment constants;
 
   EnqueueTask enqueuer;
   DeferredLoadTask deferredLoadTask;
   MirrorUsageAnalyzerTask mirrorUsageAnalyzerTask;
   DumpInfoTask dumpInfoTask;
 
-  bool get hasFunctionApplySupport => resolverWorld.hasFunctionApplySupport;
-  bool get hasIsolateSupport => resolverWorld.hasIsolateSupport;
-
   bool get hasCrashed => _reporter.hasCrashed;
 
   Stopwatch progress;
 
   bool get shouldPrintProgress {
     return options.verbose && progress.elapsedMilliseconds > 500;
   }
 
   static const int PHASE_SCANNING = 0;
   static const int PHASE_RESOLVING = 1;
@@ skipping 541 matching lines @@
         reporter.log('Inferring types...');
         globalInference.runGlobalTypeInference(mainFunction);
 
         if (stopAfterTypeInference) return;
 
         backend.onTypeInferenceComplete();
 
         reporter.log('Compiling...');
         phase = PHASE_COMPILING;
 
-        backend.onCodegenStart();
-        if (hasIsolateSupport) {
-          enqueuer.codegen
-              .applyImpact(backend.enableIsolateSupport(forResolution: false));
-        }
+        enqueuer.codegen.applyImpact(backend.onCodegenStart());
         if (compileAll) {
           libraryLoader.libraries.forEach((LibraryElement library) {
             enqueuer.codegen.applyImpact(computeImpactForLibrary(library));
           });
         }
         processQueue(enqueuer.codegen, mainFunction,
             onProgress: showCodegenProgress);
         enqueuer.codegen.logSummary(reporter.log);
 
         int programSize = backend.assembleProgram();
@@ skipping 1486 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;
 }