Add deletion to the activityLogPrivate API

* Automatically delete the whole database when Watchdog is uninstalled
* Give the activityLogPrivate API the ability to delete the entire database
* Give the activityLogPrivate API the ability to selectively delete URLs

BUG=277260
[email protected]

Review URL: https://chromiumcodereview.appspot.com/23629015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221622 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_function_histogram_value.h b/chrome/browser/extensions/extension_function_histogram_value.h
index 5148d24a..5590073 100644
--- a/chrome/browser/extensions/extension_function_histogram_value.h
+++ b/chrome/browser/extensions/extension_function_histogram_value.h
@@ -627,6 +627,8 @@
   USB_GETDEVICES,
   USB_REQUESTACCESS,
   USB_OPENDEVICE,
+  ACTIVITYLOGPRIVATE_DELETEDATABASE,
+  ACTIVITYLOGPRIVATE_DELETEURLS,
   ENUM_BOUNDARY // Last entry: Add new entries above.
 };