Remove use of package:analyzer in dependency_grapher

pkg/front_end/tool/fasta_perf.dart

 // Copyright (c) 2017, 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.
 
 /// An entrypoint used to run portions of fasta and measure its performance.
 library front_end.tool.fasta_perf;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:analyzer/src/fasta/ast_builder.dart';
 import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget;
 import 'package:front_end/src/fasta/kernel/kernel_target.dart'
     show KernelTarget;
 import 'package:front_end/src/fasta/parser.dart';
+import 'package:front_end/src/fasta/source/directive_listener.dart';
 import 'package:front_end/src/fasta/scanner.dart';
 import 'package:front_end/src/fasta/scanner/io.dart' show readBytesFromFileSync;
 import 'package:front_end/src/fasta/ticker.dart' show Ticker;
 import 'package:front_end/src/fasta/translate_uri.dart' show TranslateUri;
 import 'package:front_end/src/fasta/translate_uri.dart';
 
 /// Cumulative total number of chars scanned.
 int inputSize = 0;
 
 /// Cumulative time spent scanning.
@@ skipping 123 matching lines @@
       helper(uri.resolve(directiveUri));
     }
   }
 
   helper(start);
 }
 
 /// Parse [contents] as a Dart program and return the URIs that appear in its
 /// import, export, and part directives.
 Set<String> extractDirectiveUris(List<int> contents) {
-  var listener = new DirectiveListener();
-  new DirectiveParser(listener).parseUnit(tokenize(contents));
-  return listener.uris;
-}
-
-/// Diet parser that stops eagerly at the first sign that we have seen all the
-/// import, export, and part directives.
-class DirectiveParser extends ClassMemberParser {
-  DirectiveParser(listener) : super(listener);
-
-  static final _endToken = new SymbolToken.eof(-1);
-
-  Token parseClassOrNamedMixinApplication(Token token) => _endToken;
-  Token parseEnum(Token token) => _endToken;
-  parseTypedef(token) => _endToken;
-  parseTopLevelMember(Token token) => _endToken;
-}
-
-/// Listener that records the URIs from imports, exports, and part directives.
-class DirectiveListener extends Listener {
-  bool _inDirective = false;
-  Set<String> uris = new Set<String>();
-
-  void _enterDirective() {
-    _inDirective = true;
-  }
-
-  void _exitDirective() {
-    _inDirective = false;
-  }
-
-  beginImport(_) => _enterDirective();
-  beginExport(_) => _enterDirective();
-  beginPart(_) => _enterDirective();
-
-  endExport(export, semicolon) => _exitDirective();
-  endImport(import, deferred, asKeyword, semicolon) => _exitDirective();
-  endPart(part, semicolon) => _exitDirective();
-
-  void beginLiteralString(Token token) {
-    if (_inDirective) {
-      var quotedString = token.lexeme;
-      uris.add(quotedString.substring(1, quotedString.length - 1));
-    }
-  }
+  var listener = new DirectiveListener(acceptsNativeClause: true);
+  new TopLevelParser(listener).parseUnit(tokenize(contents));
+  return new Set<String>()
+    ..addAll(listener.imports)
+    ..addAll(listener.exports)
+    ..addAll(listener.parts);
 }
 
 /// Parses every file in [files] and reports the time spent doing so.
 void parseFiles(Map<Uri, List<int>> files) {
   scanTimer = new Stopwatch();
   var parseTimer = new Stopwatch()..start();
   files.forEach((uri, source) {
     parseFull(uri, source);
   });
   parseTimer.stop();
@@ skipping 69 matching lines @@
 /// Report that metric [name] took [time] micro-seconds to process
 /// [inputSize] characters.
 void report(String name, int time) {
   var sb = new StringBuffer();
   var padding = ' ' * (20 - name.length);
   sb.write('$name:$padding $time us, ${time ~/ 1000} ms');
   var invSpeed = (time * 1000 / inputSize).toStringAsFixed(2);
   sb.write(', $invSpeed ns/char');
   print('$sb');
 }