Add local type inference logic for integer literals.

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

Index: pkg/front_end/lib/src/fasta/fasta.dart
diff --git a/pkg/front_end/lib/src/fasta/fasta.dart b/pkg/front_end/lib/src/fasta/fasta.dart
index ccc2196bba61bc756994dd4b1a9e20b4eed8a1de..abf92c87aea58d315084f00238f64988abd29121 100644
--- a/pkg/front_end/lib/src/fasta/fasta.dart
+++ b/pkg/front_end/lib/src/fasta/fasta.dart
@@ -119,7 +119,8 @@ class CompileTask {
     TranslateUri uriTranslator =
         await TranslateUri.parse(c.options.sdk, c.options.packages);
     ticker.logMs("Read packages file");
-    DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+    DillTarget dillTarget =
+        new DillTarget(ticker, uriTranslator, c.options.strongMode);
     KernelTarget kernelTarget =
         createKernelTarget(dillTarget, uriTranslator, c.options.strongMode);
     if (c.options.strongMode) {
@@ -174,7 +175,8 @@ Future<CompilationResult> parseScript(
     try {
       TranslateUri uriTranslator = await TranslateUri.parse(null, packages);
       final Ticker ticker = new Ticker(isVerbose: verbose);
-      final DillTarget dillTarget = new DillTarget(ticker, uriTranslator);
+      final DillTarget dillTarget =
+          new DillTarget(ticker, uriTranslator, strongMode);
       dillTarget.read(patchedSdk.resolve('platform.dill'));
       final KernelTarget kernelTarget =
           new KernelTarget(dillTarget, uriTranslator, strongMode);
@@ -236,10 +238,11 @@ Future writeDepsFile(Uri script, Uri depsFile, Uri output,
     TranslateUri uriTranslator =
         await TranslateUri.parse(c.options.sdk, c.options.packages);
     ticker.logMs("Read packages file");
-    DillTarget dillTarget = new DillTarget(ticker, uriTranslator)
+    bool strongMode = false;
+    DillTarget dillTarget = new DillTarget(ticker, uriTranslator, strongMode)
       ..read(platform);
     KernelTarget kernelTarget =
-        new KernelTarget(dillTarget, uriTranslator, false, c.uriToSource);
+        new KernelTarget(dillTarget, uriTranslator, strongMode, c.uriToSource);
 
     kernelTarget.read(script);
     await dillTarget.writeOutline(null);