Pass ClosedWorld directly to codegen tasks

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 112 matching lines @@
    */
   bool stopAfterTypeInference = false;
 
   /// Output provider from user of Compiler API.
   api.CompilerOutput userOutputProvider;
 
   List<Uri> librariesToAnalyzeWhenRun;
 
   ResolvedUriTranslator get resolvedUriTranslator;
 
-  Tracer tracer;
-
   LibraryElement mainApp;
   FunctionElement mainFunction;
 
   DiagnosticReporter get reporter => _reporter;
   CommonElements get commonElements => _coreTypes;
   CoreClasses get coreClasses => _coreTypes;
   CoreTypes get coreTypes => _coreTypes;
   Resolution get resolution => _resolution;
   ParsingContext get parsingContext => _parsingContext;
 
@@ skipping 65 matching lines @@
     if (makeReporter != null) {
       _reporter = makeReporter(this, options);
     } else {
       _reporter = new CompilerDiagnosticReporter(this, options);
     }
     _resolution = createResolution();
     // TODO(johnniwinther): Initialize core types in [initializeCoreClasses] and
     // make its field final.
     _coreTypes = new _CompilerCoreTypes(_resolution, reporter);
     types = new Types(_resolution);
-    tracer = new Tracer(this, this.outputProvider);
 
     if (options.verbose) {
       progress = new Stopwatch()..start();
     }
 
     // TODO(johnniwinther): Separate the dependency tracking from the enqueuing
     // for global dependencies.
     globalDependencies = new GlobalDependencyRegistry();
 
     if (makeBackend != null) {
@@ skipping 106 matching lines @@
   // Compiles the dart script at [uri].
   //
   // The resulting future will complete with true if the compilation
   // succeeded.
   Future<bool> run(Uri uri) => selfTask.measureSubtask("Compiler.run", () {
         measurer.startWallClock();
 
         return new Future.sync(() => runInternal(uri))
             .catchError((error) => _reporter.onError(uri, error))
             .whenComplete(() {
-          tracer.close();
           measurer.stopWallClock();
         }).then((_) {
           return !compilationFailed;
         });
       });
 
   /// This method is called immediately after the [LibraryElement] [library] has
   /// been created.
   ///
   /// Use this callback method to store references to specific libraries.
@@ skipping 372 matching lines @@
             onProgress: showCodegenProgress);
         enqueuer.codegen.logSummary(reporter.log);
 
         int programSize = backend.assembleProgram(closedWorld);
 
         if (options.dumpInfo) {
           dumpInfoTask.reportSize(programSize);
           dumpInfoTask.dumpInfo(closedWorld);
         }
 
-        backend.sourceInformationStrategy.onComplete();
+        backend.onCodegenEnd();
 
         checkQueues();
       });
 
   /// Perform the steps needed to fully end the resolution phase.
   ClosedWorldRefiner closeResolution() {
     phase = PHASE_DONE_RESOLVING;
 
     WorldImpl world = resolverWorld.openWorld.closeWorld(reporter);
     // Compute whole-program-knowledge that the backend needs. (This might
@@ skipping 1478 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;
 }