Perform type inference on constructor field initializer expressions.

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

Index: pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
diff --git a/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart b/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
index 020b7606621eb8870d0e952f47d36464fe4db4d1..7d3df939ec58b9a32bfb94d0b9eba87f24667805 100644
--- a/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
+++ b/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
@@ -170,6 +170,12 @@ class TypeInferenceListener
   void expressionStatementExit(ExpressionStatement statement) =>
       genericStatementExit('expressionStatement', statement);
 
+  void fieldInitializerEnter(FieldInitializer initializer) =>
+      genericInitializerEnter("fieldInitializer", initializer);
+
+  void fieldInitializerExit(FieldInitializer initializer) =>
+      genericInitializerExit("fieldInitializer", initializer);
+
   void forInStatementEnter(ForInStatement statement) =>
       genericStatementEnter('forInStatement', statement);
 
@@ -258,11 +264,11 @@ class TypeInferenceListener
   void mapLiteralExit(MapLiteral expression, DartType typeContext) =>
       genericExpressionExit("mapLiteral", expression, typeContext);
 
+  void methodInvocationBeforeArgs(Expression expression, bool isImplicitCall) {}
+
   bool methodInvocationEnter(Expression expression, DartType typeContext) =>
       genericExpressionEnter("methodInvocation", expression, typeContext);
 
-  void methodInvocationBeforeArgs(Expression expression, bool isImplicitCall) {}
-
   void methodInvocationExit(Expression expression, Arguments arguments,
           bool isImplicitCall, DartType inferredType) =>
       genericExpressionExit("methodInvocation", expression, inferredType);