Add metrics for Safe Browsing blacklist response.

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 61a08d9356ef7a2adfeed6bfc62eed93bfdae058..8a603ef2360b9a61b0957a8c9049cae69797fe99 100644
--- a/chrome/browser/permissions/permission_uma_util.h
+++ b/chrome/browser/permissions/permission_uma_util.h
@@ -9,6 +9,7 @@
 
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/time/time.h"
 #include "chrome/browser/permissions/permission_request.h"
 #include "chrome/browser/permissions/permission_util.h"
 
@@ -41,6 +42,16 @@ enum class PermissionPersistDecision {
   NOT_PERSISTED = 2,
 };
 
+// Any new values should be inserted immediately prior to RESPONSE_NUM.
+enum SafeBrowsingResponse {
+  NOT_BLACKLISTED = 0,
+  TIMEOUT = 1,
+  BLACKLISTED = 2,
+
+  // Always keep this at the end.
+  RESPONSE_NUM,
+};
+
 // A bundle for the information sent in a PermissionReport.
 struct PermissionReportInfo {
   PermissionReportInfo(
@@ -114,7 +125,8 @@ class PermissionUmaUtil {
                                 PermissionSourceUI source_ui,
                                 const GURL& revoked_origin,
                                 Profile* profile);
-
+  static void RecordSafeBrowsingResponse(base::TimeDelta response_time,
+                                         SafeBrowsingResponse response);
   // UMA specifically for when permission prompts are shown. This should be
   // roughly equivalent to the metrics above, however it is
   // useful to have separate UMA to a few reasons: