Undeprecate IncompleteError.

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 1045 matching lines @@
   /// Look up [name] in [scope] using [token] as location information (both to
   /// report problems and as the file offset in the generated kernel code).
   /// [isQualified] should be true if [name] is a qualified access
   /// (which implies that it shouldn't be turned into a [ThisPropertyAccessor]
   /// if the name doesn't resolve in the scope).
   @override
   scopeLookup(Scope scope, String name, Token token,
       {bool isQualified: false, PrefixBuilder prefix}) {
     Builder builder = scope.lookup(name, offsetForToken(token), uri);
     if (builder != null && member.isField && builder.isInstanceMember) {
-      return new deprecated_IncompleteError(this, token,
-          "Can't access 'this' in a field initializer to read '$name'.");
+      return new IncompleteError(this, token,
+          fasta.templateThisAccessInFieldInitializer.withArguments(name));
     }
     if (builder == null || (!isInstanceContext && builder.isInstanceMember)) {
       Name n = new Name(name, library.library);
       if (prefix != null &&
           prefix.deferred &&
           builder == null &&
           "loadLibrary" == name) {
         int offset = offsetForToken(token);
         const String message = "Deferred loading isn't implemented yet.";
         // We report the error twice, the first time silently and marking it as
@@ skipping 1290 matching lines @@
     debugEvent("TypeArguments");
     push(popList(count));
   }
 
   @override
   void handleThisExpression(Token token, IdentifierContext context) {
     debugEvent("ThisExpression");
     if (context.isScopeReference && isInstanceContext) {
       push(new ThisAccessor(this, token, inInitializer));
     } else {
-      push(new deprecated_IncompleteError(
-          this, token, "Expected identifier, but got 'this'."));
+      push(new IncompleteError(this, token, fasta.messageThisAsIdentifier));
     }
   }
 
   @override
   void handleSuperExpression(Token token, IdentifierContext context) {
     debugEvent("SuperExpression");
     if (context.isScopeReference && isInstanceContext) {
       Member member = this.member.target;
       member.transformerFlags |= TransformerFlag.superCalls;
       push(new ThisAccessor(this, token, inInitializer, isSuper: true));
     } else {
-      push(new deprecated_IncompleteError(
-          this, token, "Expected identifier, but got 'super'."));
+      push(new IncompleteError(this, token, fasta.messageSuperAsIdentifier));
     }
   }
 
   @override
   void handleNamedArgument(Token colon) {
     debugEvent("NamedArgument");
     Expression value = popForValue();
     Identifier identifier = pop();
     push(new NamedExpression(identifier.name, value)
       ..fileOffset = offsetForToken(identifier.token));
@@ skipping 1426 matching lines @@
       return AsyncMarker.Async;
     } else {
       assert(identical(starToken.stringValue, "*"));
       return AsyncMarker.AsyncStar;
     }
   } else {
     return unhandled(asyncToken.lexeme, "asyncMarkerFromTokens",
         asyncToken.charOffset, null);
   }
 }