Add top level type inference logic for integer literals.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
index e0275f863ce79ea42d8d2eddb07134b54b0f67d2..f7b8accfb7e0db28f5065c47a798763aecb6a2c9 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_ast_factory.dart
@@ -15,6 +15,11 @@ class KernelAstFactory implements AstFactory {
   }
 
   @override
+  Field field(Name name, int charOffset, {String fileUri}) {
+    return new KernelField(name, fileUri: fileUri)..fileOffset = charOffset;
+  }
+
+  @override
   KernelIntLiteral intLiteral(value, int charOffset) {
     return new KernelIntLiteral(value)..fileOffset = charOffset;
   }
@@ -38,6 +43,11 @@ class KernelAstFactory implements AstFactory {
   }
 
   @override
+  StaticGet staticGet(Member readTarget, int offset) {
+    return new KernelStaticGet(readTarget)..fileOffset = offset;
+  }
+
+  @override
   KernelVariableDeclaration variableDeclaration(String name,
       {DartType type,
       Expression initializer,