Switch FE to use the libraries.json format.

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/front_end.dart';
-import 'package:front_end/physical_file_system.dart';
+import 'package:front_end/src/base/processed_options.dart';
 import 'package:front_end/src/fasta/parser.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/source/directive_listener.dart';
 import 'package:front_end/src/fasta/uri_translator.dart' show UriTranslator;
 import 'package:front_end/src/fasta/parser/native_support.dart'
     show skipNativeClause;
-import 'package:front_end/src/fasta/uri_translator_impl.dart';
 
 /// Cumulative total number of chars scanned.
 int inputSize = 0;
 
 /// Cumulative time spent scanning.
 Stopwatch scanTimer = new Stopwatch();
 
 main(List<String> args) async {
   // TODO(sigmund): provide sdk folder as well.
   if (args.length < 2) {
@@ skipping 41 matching lines @@
 // sdk directly.
 Uri sdkRoot =
     Uri.base.resolve(Platform.resolvedExecutable).resolve('patched_sdk/');
 
 /// Translates `dart:*` and `package:*` URIs to resolved URIs.
 UriTranslator uriResolver;
 
 /// Preliminary set up to be able to correctly resolve URIs on the given
 /// program.
 Future setup(Uri entryUri) async {
-  uriResolver =
-      await UriTranslatorImpl.parse(PhysicalFileSystem.instance, sdkRoot);
+  var options = new CompilerOptions()
+    ..sdkRoot = sdkRoot
+    ..compileSdk = true
+    ..packagesFileUri = Uri.base.resolve('.packages');
+  uriResolver = await new ProcessedOptions(options).getUriTranslator();
 }
 
 /// Scan [contents] and return the first token produced by the scanner.
 Token tokenize(List<int> contents) {
   scanTimer.start();
   var token = scan(contents).tokens;
   scanTimer.stop();
   return token;
 }
 
@@ skipping 150 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');
 }