| Index: third_party/WebKit/Source/core/timing/Performance.h
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| diff --git a/third_party/WebKit/Source/core/timing/Performance.h b/third_party/WebKit/Source/core/timing/Performance.h
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| index e0e751e4ce301a03256b08bbf0cb29e0d2de9663..80c54a2258ee98b9ffd9a2981c2490bc3d2b38d3 100644
 | 
| --- a/third_party/WebKit/Source/core/timing/Performance.h
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| +++ b/third_party/WebKit/Source/core/timing/Performance.h
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| @@ -76,6 +76,8 @@ class CORE_EXPORT Performance final : public PerformanceBase,
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|    // ContextLifecycleObserver overrides.
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|    void contextDestroyed(ExecutionContext*) override;
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|  
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| +  PerformanceNavigationTiming* createNavigationTimingInstance() override;
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| +
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|    static std::pair<String, DOMWindow*> sanitizedAttribution(
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|        ExecutionContext*,
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|        bool hasMultipleContexts,
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| 
 |