Add a feature which, when enabled, blocks permissions after X prompt dismissals.

chrome/browser/permissions/permission_uma_util.h

Index: chrome/browser/permissions/permission_uma_util.h
diff --git a/chrome/browser/permissions/permission_uma_util.h b/chrome/browser/permissions/permission_uma_util.h
index 4ce425c7a07df07ed9a985112dd23805ccab9c6e..ed0149ac7cc232ab6a2e075fd3cd6aa6014055db 100644
--- a/chrome/browser/permissions/permission_uma_util.h
+++ b/chrome/browser/permissions/permission_uma_util.h
@@ -114,6 +114,16 @@ class PermissionUmaUtil {
   static void PermissionPromptDenied(
       const std::vector<PermissionRequest*>& requests);
 
+  // Records |count| total dismissal actions for a prompt of type |permission|
+  // for a single origin.
+  static void PermissionPromptDismissed(content::PermissionType permission,
+                                        int count);
+
+  // Records |count| total ignore actions for a prompt of type |permission| for
+  // a single origin.
+  static void PermissionPromptIgnored(content::PermissionType permission,
+                                      int count);
+
  private:
   friend class PermissionUmaUtilTest;