Instrument analyzer's type analysis and run front_end inference tests.

pkg/analyzer/lib/src/generated/static_type_analyzer.dart

Index: pkg/analyzer/lib/src/generated/static_type_analyzer.dart
diff --git a/pkg/analyzer/lib/src/generated/static_type_analyzer.dart b/pkg/analyzer/lib/src/generated/static_type_analyzer.dart
index 1c5b9996a579c52c77f2cc605950147e4ee57ab8..d7eed746e551c3ffb2064e52e6b7d903716c1c86 100644
--- a/pkg/analyzer/lib/src/generated/static_type_analyzer.dart
+++ b/pkg/analyzer/lib/src/generated/static_type_analyzer.dart
@@ -1333,6 +1333,11 @@ class StaticTypeAnalyzer extends SimpleAstVisitor<Object> {
     } else if (element is VariableElement) {
       VariableElement variable = element;
       staticType = _promoteManager.getStaticType(variable);
+      if (_resolver.instrumentation != null && node.inGetterContext()) {
+        node.inGetterContext();
+        DartType type = _promoteManager.getType(variable);
+        _resolver.instrumentation.recordPromotion(node.offset, type);
+      }
     } else if (element is PrefixElement) {
       return null;
     } else if (element is DynamicElementImpl) {
@@ -2097,6 +2102,7 @@ class StaticTypeAnalyzer extends SimpleAstVisitor<Object> {
         if (type != null && !type.isBottom && !type.isDartCoreNull) {
           VariableElement element = node.element;
           if (element is LocalVariableElementImpl) {
+            _resolver.instrumentation?.recordInference(node.name.offset, type);
             element.type = initializer.staticType;
             node.name.staticType = initializer.staticType;
           }