Add local type inference logic for integer literals.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
index 7eb8f115e98718c72e2685348670721a175c2713..87c1681081e5d80f0ace3cbc520fe9a0c34ee4cc 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_target.dart
@@ -92,8 +92,6 @@ import 'kernel_builder.dart'
 import 'verifier.dart' show verifyProgram;
 
 class KernelTarget extends TargetImplementation {
-  final bool strongMode;
-
   final DillTarget dillTarget;
 
   /// Shared with [CompilerContext].
@@ -108,11 +106,11 @@ class KernelTarget extends TargetImplementation {
       new KernelNamedTypeBuilder("dynamic", null, -1, null);
 
   KernelTarget(
-      DillTarget dillTarget, TranslateUri uriTranslator, this.strongMode,
+      DillTarget dillTarget, TranslateUri uriTranslator, bool strongMode,
       [Map<String, Source> uriToSource])
       : dillTarget = dillTarget,
         uriToSource = uriToSource ?? CompilerContext.current.uriToSource,
-        super(dillTarget.ticker, uriTranslator) {
+        super(dillTarget.ticker, uriTranslator, strongMode) {
     resetCrashReporting();
     loader = createLoader();
   }