Implement line and column numbers.

pkg/front_end/lib/src/fasta/analyzer/ast_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.analyzer.ast_builder;
 
 import 'package:front_end/src/fasta/scanner/token.dart'
     show BeginGroupToken, Token;
 
 import 'package:analyzer/analyzer.dart';
@@ skipping 35 matching lines @@
   final AstFactory ast = standard.astFactory;
 
   final KernelLibraryBuilder library;
 
   final Builder member;
 
   final ElementStore elementStore;
 
   bool isFirstIdentifier = false;
 
-  AstBuilder(this.library, this.member, this.elementStore, Scope scope)
-      : super(scope);
+  @override
+  final Uri uri;
 
-  Uri get uri => library.fileUri ?? library.uri;
+  AstBuilder(this.library, this.member, this.elementStore, Scope scope,
+      [Uri uri])
+      : uri = uri ?? library.fileUri, super(scope);
 
   createJumpTarget(JumpTargetKind kind, int charOffset) {
     // TODO(ahe): Implement jump targets.
     return null;
   }
 
   void beginLiteralString(Token token) {
     debugEvent("beginLiteralString");
     push(token);
   }
@@ skipping 653 matching lines @@
     push(ast.showCombinator(toAnalyzerToken(showKeyword), shownNames));
   }
 
   @override
   void endHide(Token hideKeyword) {
     debugEvent("Hide");
     List<SimpleIdentifier> hiddenNames = pop();
     push(ast.hideCombinator(toAnalyzerToken(hideKeyword), hiddenNames));
   }
 }