merge fasta.Token into analyzer.Token

pkg/front_end/lib/src/fasta/target_implementation.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.target_implementation;
 
 import 'package:kernel/target/vm.dart' show VmTarget;
 
 import 'builder/builder.dart' show Builder, ClassBuilder, LibraryBuilder;
 
 import 'parser/dart_vm_native.dart' as vm show skipNativeClause;
 
-import 'scanner/token.dart' show Token;
+import '../scanner/token.dart' show Token;
 
 import 'loader.dart' show Loader;
 
 import 'quote.dart' show unescapeString;
 
 import 'target.dart' show Target;
 
 import 'ticker.dart' show Ticker;
 
 import 'translate_uri.dart' show TranslateUri;
@@ skipping 61 matching lines @@
   }
 
   Token skipNativeClause(Token token) => vm.skipNativeClause(token);
 
   String extractNativeMethodName(Token token) =>
       unescapeString(token.next.lexeme);
 
   void addSourceInformation(
       Uri uri, List<int> lineStarts, List<int> sourceCode);
 }