Final batch adding real histogram values for extension events.

extensions/browser/extension_event_histogram_value.h

Index: extensions/browser/extension_event_histogram_value.h
diff --git a/extensions/browser/extension_event_histogram_value.h b/extensions/browser/extension_event_histogram_value.h
index 625304b7c87b7cde04e6e9006da9e3bf39a586c2..2313aaba1a42f97afe9044f252a3bdc0c7d5a643 100644
--- a/extensions/browser/extension_event_histogram_value.h
+++ b/extensions/browser/extension_event_histogram_value.h
@@ -360,6 +360,10 @@ enum HistogramValue {
   CAST_CHANNEL_ON_ERROR,
   SCREENLOCK_PRIVATE_ON_CHANGED,
   SCREENLOCK_PRIVATE_ON_AUTH_ATTEMPTED,
+  TYPES_CHROME_SETTING_ON_CHANGE,
+  TYPES_PRIVATE_CHROME_DIRECT_SETTING_ON_CHANGE,
+  WEB_VIEW_INTERNAL_ON_MESSAGE,  // TODO(kalman): where are the rest of the
+                                 // webview events?
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY