| Index: Source/core/html/imports/HTMLImportChild.h | 
| diff --git a/Source/core/html/imports/HTMLImportChild.h b/Source/core/html/imports/HTMLImportChild.h | 
| index 561532cbe6ee1456cdd725e659205057389e8834..15b2d4d669d76fe3d0d206d7e5437603df13d4f1 100644 | 
| --- a/Source/core/html/imports/HTMLImportChild.h | 
| +++ b/Source/core/html/imports/HTMLImportChild.h | 
| @@ -88,6 +88,7 @@ public: | 
| void didFinishLoading(); | 
| void didFinishUpgradingCustomElements(); | 
| bool isLoaded() const; | 
| +    bool isFirst() const; | 
| void normalize(); | 
|  | 
| private: | 
| @@ -101,6 +102,7 @@ private: | 
| void createLoader(); | 
| void shareLoader(HTMLImportChild*); | 
| void ensureLoader(); | 
| +    void createCustomElementMicrotaskStepIfNeeded(); | 
|  | 
| #if ENABLE(OILPAN) | 
| Persistent<Document> m_master; | 
|  |