Support autopresenting WebVr content.

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index 63791ecd3148269a6f43c87350e813599c2f7635..354c8a8e4207ee38067cb8ee8786a748eb042736 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -21406,6 +21406,7 @@ uploading your change for review.  These are checked by presubmit scripts.
   <int value="-1460462432" label="disable-media-source"/>
   <int value="-1456004000" label="VrShell:disabled"/>
   <int value="-1443796945" label="OfflinePagesSharing:disabled"/>
+  <int value="-1440440375" label="WebVrAutopresent:enabled"/>
   <int value="-1440152291" label="disable-gesture-typing"/>
   <int value="-1438279809" label="GamepadExtensions:disabled"/>
   <int value="-1433719718" label="enable-webrtc-stun-origin"/>
@@ -21777,6 +21778,7 @@ from previous Chrome versions.
   <int value="-78035185" label="custom_summary"/>
   <int value="-77872983" label="BookmarkAppsMac:disabled"/>
   <int value="-76631048" label="disable-offline-auto-reload-visible-only"/>
+  <int value="-72455054" label="WebVrAutopresent:disabled"/>
   <int value="-70595606" label="ash-enable-unified-desktop"/>
   <int value="-68877684" label="BackgroundVideoTrackOptimization:enabled"/>
   <int value="-68225452" label="enable-translate-new-ux"/>