Cleanup references to the old DDC repo

pkg/dev_compiler/tool/input_sdk/private/interceptors.dart

Index: pkg/dev_compiler/tool/input_sdk/private/interceptors.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/private/interceptors.dart b/pkg/dev_compiler/tool/input_sdk/private/interceptors.dart
index daa0e77651a3f56b9a74012c47d6b15c42cc2f6b..4c84cc9592c890fc7f6869a716734ecbbdf78c71 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/interceptors.dart
+++ b/pkg/dev_compiler/tool/input_sdk/private/interceptors.dart
@@ -98,7 +98,7 @@ class UnknownJavaScriptObject extends JavaScriptObject {
 // dart:html can be used in dart2js an dev compiler.
 // Warning: calls to these methods need to be removed before custom elements
 // and cross-frame dom objects behave correctly in ddc.
-// See https://github.com/dart-lang/dev_compiler/issues/517
+// See https://github.com/dart-lang/sdk/issues/28326
 findInterceptorConstructorForType(Type type) { }
 findConstructorForNativeSubclassType(Type type, String name) { }
 getNativeInterceptor(object) {}