Histograms.xml python script housekeeping

content/browser/bad_message.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_BAD_MESSAGE_H_
 #define CONTENT_BROWSER_BAD_MESSAGE_H_
 
 namespace content {
 class BrowserMessageFilter;
 class RenderProcessHost;
 
 namespace bad_message {
 
 // The browser process often chooses to terminate a renderer if it receives
 // a bad IPC message. The reasons are tracked for metrics.
 //
 // Content embedders should implement their own bad message statistics but
 // should use similar histogram names to make analysis easier.
 //
 // NOTE: Do not remove or reorder elements in this list. Add new entries at the
 // end. Items may be renamed but do not change the values. We rely on the enum
-// values in histograms. Also update histograms.xml with any new values.
+// values in histograms. Also update histograms.xml with any new values by
+// running:
+//    python tools/metrics/histograms/update_bad_message_reasons.py
 enum BadMessageReason {
   NC_IN_PAGE_NAVIGATION = 0,
   RFH_CAN_COMMIT_URL_BLOCKED = 1,
   RFH_CAN_ACCESS_FILES_OF_PAGE_STATE = 2,
   RFH_SANDBOX_FLAGS = 3,
   RFH_NO_PROXY_TO_PARENT = 4,
   RPH_DESERIALIZATION_FAILED = 5,
   RVH_CAN_ACCESS_FILES_OF_PAGE_STATE = 6,
   RVH_FILE_CHOOSER_PATH = 7,
   RWH_SYNTHETIC_GESTURE = 8,
@@ skipping 79 matching lines @@
 
 // Called when a browser message filter receives a bad IPC message from a
 // renderer or other child process. Logs the event, records a histogram metric
 // for the |reason|, and terminates the process for |filter|.
 void ReceivedBadMessage(BrowserMessageFilter* filter, BadMessageReason reason);
 
 }  // namespace bad_message
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BAD_MESSAGE_H_