Sync csd.proto with server-side version.

net/base/net_log_event_type_list.h

Index: net/base/net_log_event_type_list.h
diff --git a/net/base/net_log_event_type_list.h b/net/base/net_log_event_type_list.h
index 8312a5320d2f3decee98076cef3439204abee17a..faa231f73f6ee09d6cb26ac637382636c267c416 100644
--- a/net/base/net_log_event_type_list.h
+++ b/net/base/net_log_event_type_list.h
@@ -1572,7 +1572,9 @@ EVENT_TYPE(DOWNLOAD_URL_REQUEST)
 //                     |state_info.force_filename|
 //                     |suggested_filename_|
 //                     the filename specified in the final URL>,
-//     "danger_type": <NOT,FILE,URL,CONTENT,MAYBE_CONTENT>,
+//     "danger_type": <NOT_DANGEROUS, DANGEROUS_FILE, DANGEROUS_URL,
+//                     DANGEROUS_CONTENT, MAYBE_DANGEROUS_CONTENT,
+//                     UNCOMMON_CONTENT, USER_VALIDATED, DANGEROUS_HOST>,
 //     "start_offset": <Where to start writing (defaults to 0)>,
 //     "has_user_gesture": <Whether or not we think the user initiated
 //                          the download>
@@ -1586,7 +1588,7 @@ EVENT_TYPE(DOWNLOAD_ITEM_ACTIVE)
 // This event is created when a download item's danger type
 // has been modified.
 //   {
-//     "danger_type": <NOT,FILE,URL,CONTENT,MAYBE_CONTENT,USER_VALIDATED>,
+//     "danger_type": <The new danger type.  See above for possible values.>,
 //   }
 EVENT_TYPE(DOWNLOAD_ITEM_SAFETY_STATE_UPDATED)