Remove async modifier from outlines

pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart
index 79df4f8ab61870f81cd66d277bf94abab504b006..210e5a11886da11fda5cb602790742f26eeabbcf 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_procedure_builder.dart
@@ -178,7 +178,7 @@ class KernelProcedureBuilder extends KernelFunctionBuilder {
   final Procedure procedure;
   final int charOpenParenOffset;
 
-  AsyncMarker actualAsyncModifier;
+  AsyncMarker actualAsyncModifier = AsyncMarker.Sync;
 
   final ConstructorReferenceBuilder redirectionTarget;
 
@@ -189,7 +189,6 @@ class KernelProcedureBuilder extends KernelFunctionBuilder {
       String name,
       List<TypeVariableBuilder> typeVariables,
       List<FormalParameterBuilder> formals,
-      this.actualAsyncModifier,
       ProcedureKind kind,
       KernelLibraryBuilder compilationUnit,
       int charOffset,
@@ -223,6 +222,7 @@ class KernelProcedureBuilder extends KernelFunctionBuilder {
     if (function != null) {
       // No parent, it's an enum.
       function.asyncMarker = actualAsyncModifier;
+      function.dartAsyncMarker = actualAsyncModifier;

[Siggi Cherem (dart-lang), 2017/05/18 19:44:03]

Note: when `function` is created we will pass AsyncModifier.Sync, and it gets
copied into dartAsyncMarker. Now that we are changing the value later in time,
we need to also update the secondary location as well.

     }
   }