Implement the private API for quick unlock.

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 cb2b38f2be05ce572828dcb064397377cd0139fa..c4eed8f652a9341ef418863ed5100c47ec1d2e98 100644
--- a/extensions/browser/extension_event_histogram_value.h
+++ b/extensions/browser/extension_event_histogram_value.h
@@ -420,6 +420,7 @@ enum HistogramValue {
   BLUETOOTH_LOW_ENERGY_ON_DESCRIPTOR_READ_REQUEST,
   BLUETOOTH_LOW_ENERGY_ON_DESCRIPTOR_WRITE_REQUEST,
   ACCESSIBILITY_PRIVATE_ON_ACCESSIBILITY_GESTURE,
+  QUICK_UNLOCK_PRIVATE_ON_ACTIVE_MODES_CHANGED,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py

[Mark P, 2016/06/23 18:31:55]

It still looks like you didn't do this.

[jdufault, 2016/06/23 18:53:43]

That's really weird; I definitely ran it. I think I was in the middle of a
rebase when I ran it though, so that might have caused the change to not get
picked up.

   ENUM_BOUNDARY