dart2js: Support https.

sdk/lib/_internal/compiler/implementation/source_file_provider.dart

 // Copyright (c) 2013, 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 source_file_provider;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math' as math;
@@ skipping 22 matching lines @@
   Map<String, SourceFile> sourceFiles = <String, SourceFile>{};
   int dartCharactersRead = 0;
 
   Future<String> readStringFromUri(Uri resourceUri) {
     return readUtf8BytesFromUri(resourceUri).then(UTF8.decode);
   }
 
   Future<List<int>> readUtf8BytesFromUri(Uri resourceUri) {
     if (resourceUri.scheme == 'file') {
       return _readFromFile(resourceUri);
-    } else if (resourceUri.scheme == 'http') {
+    } else if (resourceUri.scheme == 'http' || resourceUri.scheme == 'https') {
       return _readFromHttp(resourceUri);
     } else {
       throw new ArgumentError("Unknown scheme in uri '$resourceUri'");
     }
   }
 
   Future<List<int>> _readFromFile(Uri resourceUri) {
     assert(resourceUri.scheme == 'file');
     List<int> source;
     try {
@@ skipping 259 matching lines @@
   var onAdd, onClose;
 
   EventSinkWrapper(this.onAdd, this.onClose);
 
   void add(String data) => onAdd(data);
 
   void addError(error, [StackTrace stackTrace]) => throw error;
 
   void close() => onClose();
 }