Use FastUri instead of Uri in analyzer.

pkg/analyzer/test/generated/analysis_context_factory.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 analyzer.test.generated.analysis_context_factory;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 494 matching lines @@
 
   void runTasks() {
     AnalysisResult result = context.performAnalysisTask();
     while (result.changeNotices != null) {
       result = context.performAnalysisTask();
     }
   }
 }
 
 class TestPackageUriResolver extends UriResolver {
-  Map<Uri, Source> sourceMap = new HashMap<Uri, Source>();
+  Map<String, Source> sourceMap = new HashMap<String, Source>();
 
   TestPackageUriResolver(Map<String, String> map) {
     map.forEach((String uri, String contents) {
-      sourceMap[Uri.parse(uri)] =
-          new StringSource(contents, '/test_pkg_source.dart');
+      sourceMap[uri] = new StringSource(contents, '/test_pkg_source.dart');
     });
   }
 
   @override
-  Source resolveAbsolute(Uri uri, [Uri actualUri]) => sourceMap[uri];
+  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
+    String uriString = uri.toString();
+    return sourceMap[uriString];
+  }
 
   @override
   Uri restoreAbsolute(Source source) => throw new UnimplementedError();
 }
 
 class _AnalysisContextFactory_initContextWithCore
     extends DirectoryBasedDartSdk {
   final bool enableAsync;
   _AnalysisContextFactory_initContextWithCore(JavaFile arg0,
       {this.enableAsync: true})
@@ skipping 17 matching lines @@
 
   void _addLibrary(LibraryMap map, String uri, bool isInternal, String path) {
     SdkLibraryImpl library = new SdkLibraryImpl(uri);
     if (isInternal) {
       library.category = "Internal";
     }
     library.path = path;
     map.setLibrary(uri, library);
   }
 }