Add type inference for invalid constructor initializers.

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

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.body_builder;
 
 import 'package:kernel/ast.dart'
     hide InvalidExpression, InvalidInitializer, InvalidStatement;
 
 import 'package:kernel/class_hierarchy.dart' show ClassHierarchy;
@@ skipping 3119 matching lines @@
   Statement deprecated_buildCompileTimeErrorStatement(error,
       [int charOffset = -1]) {
     return new KernelExpressionStatement(
         deprecated_buildCompileTimeError(error, charOffset));
   }
 
   @override
   Initializer buildInvalidInitializer(Expression expression,
       [int charOffset = -1]) {
     needsImplicitSuperInitializer = false;
-    return new LocalInitializer(new VariableDeclaration.forValue(expression))
+    return new KernelInvalidInitializer(
+        new VariableDeclaration.forValue(expression))
       ..fileOffset = charOffset;
   }
 
   Initializer buildDuplicatedInitializer(
       String name, int offset, int previousInitializerOffset) {
     Initializer initializer = buildInvalidInitializer(
         deprecated_buildCompileTimeError(
             "'$name' has already been initialized.", offset),
         offset);
     deprecated_addCompileTimeError(
@@ skipping 650 matching lines @@
       return AsyncMarker.Async;
     } else {
       assert(identical(starToken.stringValue, "*"));
       return AsyncMarker.AsyncStar;
     }
   } else {
     return unhandled(asyncToken.lexeme, "asyncMarkerFromTokens",
         asyncToken.charOffset, null);
   }
 }