Fix incorrect IPC_ENUM_TRAITS_MAX_VALUE for NTPLoggingEventType

The comment for IPC_ENUM_TRAITS_MAX_VALUE says you should pass the largest
possible value, inclusive. But NTP_NUM_EVENT_TYPES is one larger than the
largest possible NTPLoggingEventType.

Review URL: https://codereview.chromium.org/662823002

Cr-Commit-Position: refs/heads/master@{#300248}
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index 3583f896..8bba1bcb 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -188,7 +188,7 @@
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS_MAX_VALUE(NTPLoggingEventType,
-                          NTP_NUM_EVENT_TYPES)
+                          NTP_EVENT_TYPE_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(WebApplicationInfo::MobileCapable,
                           WebApplicationInfo::MOBILE_CAPABLE_APPLE)