Update OnCommit to return ObservePolicy.

chrome/browser/page_load_metrics/observers/google_captcha_observer.cc

Index: chrome/browser/page_load_metrics/observers/google_captcha_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/google_captcha_observer.cc b/chrome/browser/page_load_metrics/observers/google_captcha_observer.cc
index b1bdf1ef6891149d6059cee007f87893017b596a..afdad0f7f0390516589e6bba2e3f137e9f7691e6 100644
--- a/chrome/browser/page_load_metrics/observers/google_captcha_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/google_captcha_observer.cc
@@ -44,12 +44,13 @@ bool IsGoogleCaptcha(const GURL& url) {
 
 GoogleCaptchaObserver::GoogleCaptchaObserver() : saw_solution_(false) {}
 
-void GoogleCaptchaObserver::OnCommit(
-    content::NavigationHandle* navigation_handle) {
+page_load_metrics::PageLoadMetricsObserver::ObservePolicy
+GoogleCaptchaObserver::OnCommit(content::NavigationHandle* navigation_handle) {
   if (!navigation_handle->IsSamePage()
       && IsGoogleCaptcha(navigation_handle->GetURL())) {
     RecordGoogleCaptchaEvent(GOOGLE_CAPTCHA_SHOWN);
   }
+  return CONTINUE_OBSERVING;
 }
 
 void GoogleCaptchaObserver::OnRedirect(