Allow script to request durable storage permission (chrome side)

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 1caf2b88d7866583f25d8894835f45bd8bf48cf5..8ae2a21495e1b44d3b8b215e7c31c7e889960a3c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -66206,6 +66206,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <int value="3" label="PERMISSION_NOTIFICATIONS"/>
   <int value="4" label="PERMISSION_GEOLOCATION"/>
   <int value="5" label="PERMISSION_PROTECTED_MEDIA_IDENTIFIER"/>
+  <int value="6" label="PERMISSION_DURABLE_STORAGE"/>
 </enum>
 
 <enum name="PhotoEditorFileType" type="int">
@@ -75752,6 +75753,7 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="Notifications" label="Notification permission actions"/>
   <suffix name="Geolocation" label="Geolocation permission actions"/>
   <suffix name="ProtectedMedia" label="Protected media permission actions"/>
+  <suffix name="DurableStorage" label="Durable Storage permission actions"/>
   <affected-histogram name="ContentSettings.PermissionActions"/>
   <affected-histogram name="ContentSettings.PermissionActionsInsecureOrigin"/>
   <affected-histogram name="ContentSettings.PermissionActionsSecureOrigin"/>