Implement permissions embargo for prompts which are repeatedly ignored.

chrome/browser/permissions/permission_result.h

Index: chrome/browser/permissions/permission_result.h
diff --git a/chrome/browser/permissions/permission_result.h b/chrome/browser/permissions/permission_result.h
index 04d2fdaedb42b3d37a72aa028cf0d6ab76015195..1173c4aeb5397b4807604acbf713c91f764b4879 100644
--- a/chrome/browser/permissions/permission_result.h
+++ b/chrome/browser/permissions/permission_result.h
@@ -7,22 +7,25 @@
 
 #include "components/content_settings/core/common/content_settings.h"
 
-// Identifies the source or reason for a permission status being returned. This
-// enum backs an UMA histogram and must be treated as append-only.
+// Identifies the source or reason for a permission status being returned.
 enum class PermissionStatusSource {
   // The reason for the status is not specified.
   UNSPECIFIED,
 
-  // The status is the result of being blocked due to the user dismissing a
-  // permission prompt multiple times.
-  MULTIPLE_DISMISSALS,
-
   // The status is the result of being blocked because the permission is on the
   // safe browsing blacklist.
   SAFE_BROWSING_BLACKLIST,
 
   // The status is the result of being blocked by the permissions kill switch.
   KILL_SWITCH,
+
+  // The status is the result of being blocked due to the user dismissing a
+  // permission prompt multiple times.
+  MULTIPLE_DISMISSALS,
+
+  // The status is the result of being blocked due to the user ignoring a
+  // permission prompt multiple times.
+  MULTIPLE_IGNORES,
 };
 
 struct PermissionResult {