| Index: tools/metrics/histograms/histograms.xml | 
| diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml | 
| index 2bb0c08e8bf28f407f7c5d54c7648401c91fb1f8..8812a56a6afe9da5163c6705d488e8f1943f7674 100644 | 
| --- a/tools/metrics/histograms/histograms.xml | 
| +++ b/tools/metrics/histograms/histograms.xml | 
| @@ -79875,6 +79875,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries. | 
| </summary> | 
| </histogram> | 
|  | 
| +<histogram name="VR.Shell.EncounteredUnsupportedMode" enum="VRUnsupportedMode"> | 
| +  <owner>vollick@chromium.org</owner> | 
| +  <summary> | 
| +    We must exit VR mode when browsing in certain situations. This tracks which | 
| +    situations are encountered in practice. | 
| +  </summary> | 
| +</histogram> | 
| + | 
| <histogram name="VRDisplayPresentResult" enum="PresentationResult"> | 
| <owner>billorr@chromium.org</owner> | 
| <summary> | 
|  |