Add FunctionEntity.asyncMarker and refactor SourceInformationStrategy to avoid ResolvedAst

pkg/compiler/lib/src/ssa/builder.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.
 
 import 'dart:collection';
 
 import 'package:js_runtime/shared/embedded_names.dart';
 
 import '../closure.dart';
 import '../common.dart';
@@ skipping 253 matching lines @@
       : this.infoReporter = backend.compiler.dumpInfoTask,
         this.backend = backend,
         this.constantSystem = backend.constantSystem,
         this.rtiSubstitutions = backend.rtiSubstitutions {
     assert(target.isImplementation);
     elementInferenceResults = _resultOf(target);
     assert(elementInferenceResults != null);
     graph.element = target;
     sourceElementStack.add(target);
     sourceInformationBuilder =
-        sourceInformationFactory.createBuilderForContext(resolvedAst);
+        sourceInformationFactory.createBuilderForContext(target);
     graph.sourceInformation =
         sourceInformationBuilder.buildVariableDeclaration();
     localsHandler = new LocalsHandler(
         this,
         target,
         target.memberContext,
         target.contextClass,
         null,
         closedWorld.nativeData,
         closedWorld.interceptorData);
@@ skipping 373 matching lines @@
     return allInlinedFunctionsCalledOnce && isFunctionCalledOnce(element);
   }
 
   inlinedFrom(ResolvedAst resolvedAst, f()) {
     MemberElement element = resolvedAst.element;
     assert(element is FunctionElement || element is VariableElement);
     return reporter.withCurrentElement(element.implementation, () {
       // The [sourceElementStack] contains declaration elements.
       SourceInformationBuilder oldSourceInformationBuilder =
           sourceInformationBuilder;
-      sourceInformationBuilder =
-          sourceInformationBuilder.forContext(resolvedAst);
+      sourceInformationBuilder = sourceInformationBuilder.forContext(element);
       sourceElementStack.add(element.declaration);
       var result = f();
       sourceInformationBuilder = oldSourceInformationBuilder;
       sourceElementStack.removeLast();
       return result;
     });
   }
 
   /**
    * Return null so it is simple to remove the optional parameters completely
@@ skipping 6121 matching lines @@
       this.oldReturnLocal,
       this.oldReturnType,
       this.oldResolvedAst,
       this.oldStack,
       this.oldLocalsHandler,
       this.inTryStatement,
       this.allFunctionsCalledOnce,
       this.oldElementInferenceResults)
       : super(function);
 }