Perform type inference on redirecting initializers (`C() : this(...);`).

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 cbc22121465bcf63854865ba5e735f04d7ce020a..c7bfd35f644324e177df6b6a0d9c9e2b9177abfc 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
@@ -17,6 +17,10 @@ class TypeInferenceBase {
   void debugExpressionExit(
       String expressionType, Expression expression, DartType inferredType) {}
 
+  void debugInitializerEnter(String initializerType, Initializer initializer) {}
+
+  void debugInitializerExit(String initializerType, Initializer initializer) {}
+
   void debugStatementEnter(String statementType, Statement statement) {}
 
   void debugStatementExit(String statementType, Statement statement) {}
@@ -36,6 +40,14 @@ class TypeInferenceDebugging implements TypeInferenceBase {
     print('Exit $expressionType($expression) (type=$inferredType)');
   }
 
+  void debugInitializerEnter(String initializerType, Initializer initializer) {
+    print('Enter $initializerType($initializer)');
+  }
+
+  void debugInitializerExit(String initializerType, Initializer initializer) {
+    print('Exit $initializerType($initializer)');
+  }
+
   void debugStatementEnter(String statementType, Statement statement) {
     print('Enter $statementType($statement)');
   }
@@ -170,6 +182,12 @@ class TypeInferenceListener
   void nullLiteralExit(NullLiteral expression, DartType inferredType) =>
       debugExpressionExit("nullLiteral", expression, inferredType);
 
+  void redirectingInitializerEnter(RedirectingInitializer initializer) =>
+      debugInitializerEnter("redirectingInitializer", initializer);
+
+  void redirectingInitializerExit(RedirectingInitializer initializer) =>
+      debugInitializerExit("redirectingInitializer", initializer);
+
   void returnStatementEnter(ReturnStatement statement) =>
       debugStatementEnter('returnStatement', statement);