| Index: chrome/browser/page_load_metrics/metrics_web_contents_observer.h
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| diff --git a/chrome/browser/page_load_metrics/metrics_web_contents_observer.h b/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
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| index 5ecd66cc430ccdb20728f6f050ae53c205a64231..e265e5d3511b249e53dffa755cd2ea6d90c3fc66 100644
 | 
| --- a/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
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| +++ b/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
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| @@ -60,6 +60,7 @@ class MetricsWebContentsObserver
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|        content::NavigationHandle* navigation_handle) override;
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|    void NavigationStopped() override;
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|    void OnInputEvent(const blink::WebInputEvent& event) override;
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| +  void OnInputEventAck(const blink::WebInputEvent& event) override {};
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|    void WasShown() override;
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|    void WasHidden() override;
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|    void RenderProcessGone(base::TerminationStatus status) override;
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| 
 |