dart2js: Support https.

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

Index: sdk/lib/_internal/compiler/implementation/source_file_provider.dart
diff --git a/sdk/lib/_internal/compiler/implementation/source_file_provider.dart b/sdk/lib/_internal/compiler/implementation/source_file_provider.dart
index 5f8bee3ed6c7d5553329be3f8b9f3d4e6574c7e9..ebd6846fb2f7650b04699274bf2abf67d82494dd 100644
--- a/sdk/lib/_internal/compiler/implementation/source_file_provider.dart
+++ b/sdk/lib/_internal/compiler/implementation/source_file_provider.dart
@@ -40,7 +40,7 @@ abstract class SourceFileProvider {
   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'");