Revert "Patched in Dartium JsInterop"

tools/dom/templates/html/impl/impl_ShadowRoot.darttemplate

 // Copyright (c) 2012, 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.
 
 // WARNING: Do not edit - generated code.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
@@ skipping 17 matching lines @@
   }
 
   @deprecated
   bool get resetStyleInheritance {
     _shadowRootDeprecationReport();
     // Default value from when it was specified.
     return false;
   }
 
   @deprecated
-  set resetStyleInheritance(bool value) {
+  void set resetStyleInheritance(bool value) {
     _shadowRootDeprecationReport();
   }
 
   @deprecated
   bool get applyAuthorStyles {
     _shadowRootDeprecationReport();
     // Default value from when it was specified.
     return false;
   }
 
   @deprecated
-  set applyAuthorStyles(bool value) {
+  void set applyAuthorStyles(bool value) {
     _shadowRootDeprecationReport();
   }
 }