| Index: tools/metrics/histograms/histograms.xml | 
| diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml | 
| index 56ecbb048820ec70db206c90e9b774b6e65071f8..fc547ca06f294906afb80dd2c70293b90356d11b 100644 | 
| --- a/tools/metrics/histograms/histograms.xml | 
| +++ b/tools/metrics/histograms/histograms.xml | 
| @@ -37534,6 +37534,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries. | 
|  | 
| <histogram name="PageLoad.AbortTiming.UnknownNavigation" units="ms"> | 
| <owner>csharrison@chromium.org</owner> | 
| +  <obsolete> | 
| +    We now have sufficient infrastructure to always characterize aborts that | 
| +    resulted in new navigations. | 
| +  </obsolete> | 
| <summary> | 
| This metric is still experimental and not yet ready to be relied upon. | 
| Measures the time from navigation start to the time the page load was | 
|  |