Remove class FastUri from analyzer.

pkg/analyzer/lib/src/context/source.dart

Index: pkg/analyzer/lib/src/context/source.dart
diff --git a/pkg/analyzer/lib/src/context/source.dart b/pkg/analyzer/lib/src/context/source.dart
index 1059b63657776e3d8d377f643877e947fe0171af..21cd40e9ba607d06a520a9107de4f3fde18f2f8a 100644
--- a/pkg/analyzer/lib/src/context/source.dart
+++ b/pkg/analyzer/lib/src/context/source.dart
@@ -15,7 +15,6 @@ import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart' as utils;
-import 'package:analyzer/src/util/fast_uri.dart';
 import 'package:package_config/packages.dart';
 
 /**
@@ -113,7 +112,7 @@ class SourceFactoryImpl implements SourceFactory {
   @override
   Source forUri(String absoluteUri) {
     try {
-      Uri uri = FastUri.parse(absoluteUri);
+      Uri uri = Uri.parse(absoluteUri);
       if (uri.isAbsolute) {
         return _internalResolveUri(null, uri);
       }
@@ -158,7 +157,7 @@ class SourceFactoryImpl implements SourceFactory {
     }
     try {
       // Force the creation of an escaped URI to deal with spaces, etc.
-      return _internalResolveUri(containingSource, FastUri.parse(containedUri));
+      return _internalResolveUri(containingSource, Uri.parse(containedUri));
     } on FormatException {
       return null;
     } catch (exception, stackTrace) {