Add top level type inference logic for integer literals.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_enum_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_enum_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_enum_builder.dart
index 62c03a6fed6470329bcbf353c48bab5533b1aa95..d0bf021010c845bada6dd29cb9c1976a4eee5c45 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_enum_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_enum_builder.dart
@@ -4,6 +4,8 @@
 
 library fasta.kernel_enum_builder;
 
+import 'package:front_end/src/fasta/builder/ast_factory.dart' show AstFactory;
+
 import 'package:kernel/ast.dart'
     show
         Arguments,
@@ -87,6 +89,7 @@ class KernelEnumBuilder extends SourceClassBuilder
             null, charOffset, cls);
 
   factory KernelEnumBuilder(
+      AstFactory astFactory,
       List<MetadataBuilder> metadata,
       String name,
       List<Object> constantNamesAndOffsets,
@@ -121,7 +124,15 @@ class KernelEnumBuilder extends SourceClassBuilder
     ///       String toString() => { 0: ‘E.id0’, . . ., n-1: ‘E.idn-1’}[index]
     ///     }
     members["index"] = new KernelFieldBuilder(
-        null, intType, "index", finalMask, parent, charOffset);
+        astFactory,
+        parent.loader.topLevelTypeInferrer,
+        null,
+        intType,
+        "index",
+        finalMask,
+        parent,
+        charOffset,
+        null);
     KernelConstructorBuilder constructorBuilder = new KernelConstructorBuilder(
         null,
         constMask,
@@ -140,7 +151,15 @@ class KernelEnumBuilder extends SourceClassBuilder
     int index = 0;
     List<MapEntry> toStringEntries = <MapEntry>[];
     KernelFieldBuilder valuesBuilder = new KernelFieldBuilder(
-        null, listType, "values", constMask | staticMask, parent, charOffset);
+        astFactory,
+        parent.loader.topLevelTypeInferrer,
+        null,
+        listType,
+        "values",
+        constMask | staticMask,
+        parent,
+        charOffset,
+        null);
     members["values"] = valuesBuilder;
     KernelProcedureBuilder toStringBuilder = new KernelProcedureBuilder(
         null,
@@ -165,7 +184,15 @@ class KernelEnumBuilder extends SourceClassBuilder
         continue;
       }
       KernelFieldBuilder fieldBuilder = new KernelFieldBuilder(
-          null, selfType, name, constMask | staticMask, parent, charOffset);
+          astFactory,
+          parent.loader.topLevelTypeInferrer,
+          null,
+          selfType,
+          name,
+          constMask | staticMask,
+          parent,
+          charOffset,
+          null);
       members[name] = fieldBuilder;
       toStringEntries.add(new MapEntry(
           new IntLiteral(index), new StringLiteral("$className.$name")));