Update OnCommit to return ObservePolicy.

chrome/browser/page_load_metrics/observers/google_captcha_observer.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/page_load_metrics/observers/google_captcha_observer.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
 #include "chrome/common/page_load_metrics/page_load_timing.h"
@@ skipping 26 matching lines @@
   return (base::StartsWith(url.host_piece(), "ipv4.google.",
                            base::CompareCase::SENSITIVE)
           || base::StartsWith(url.host_piece(), "ipv6.google.",
                               base::CompareCase::SENSITIVE))
       && base::StartsWith(url.path_piece(), "/sorry",
                           base::CompareCase::SENSITIVE);
 }
 
 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(
     content::NavigationHandle* navigation_handle) {
   if (IsGoogleCaptcha(navigation_handle->GetReferrer().url) && !saw_solution_) {
     RecordGoogleCaptchaEvent(GOOGLE_CAPTCHA_SOLVED);
     saw_solution_ = true;
   }
 }
 
 }  // namespace google_captcha_observer