Add new certificateProvider extension API.

BUG=514575

Review URL: https://codereview.chromium.org/1232553003

Cr-Commit-Position: refs/heads/master@{#347916}
diff --git a/extensions/browser/extension_function_histogram_value.h b/extensions/browser/extension_function_histogram_value.h
index 5982ed3..32dab82 100644
--- a/extensions/browser/extension_function_histogram_value.h
+++ b/extensions/browser/extension_function_histogram_value.h
@@ -1138,6 +1138,8 @@
   BROWSINGDATA_REMOVECACHESTORAGE,
   VIRTUALKEYBOARDPRIVATE_SETKEYBOARDSTATE,
   VIRTUALKEYBOARDPRIVATE_SETHOTRODKEYBOARD,
+  CERTIFICATEPROVIDERINTERNAL_REPORTSIGNATURE,
+  CERTIFICATEPROVIDERINTERNAL_REPORTCERTIFICATES,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY