Add extra parameter to BrowserChildProcessCrashed to pass the exit_code at time of crash/termination

content/public/browser/browser_child_process_observer.h

 // Copyright 2013 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_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_
 
 #include "content/common/content_export.h"
 
 namespace content {
 
 struct ChildProcessData;
 
 // An observer API implemented by classes which are interested in browser child
 // process events. Note that render processes cannot be observed through this
 // interface; use RenderProcessHostObserver instead.
 class CONTENT_EXPORT BrowserChildProcessObserver {
  public:
   // Called when a child process host has connected to a child process.
   virtual void BrowserChildProcessHostConnected(const ChildProcessData& data) {}
 
   // Called after a ChildProcessHost is disconnected from the child process.
   virtual void BrowserChildProcessHostDisconnected(
       const ChildProcessData& data) {}
 
   // Called when a child process disappears unexpectedly as a result of a crash.
-  virtual void BrowserChildProcessCrashed(const ChildProcessData& data) {}
+  // |exit_code| contains the exit code from the process.
+  virtual void BrowserChildProcessCrashed(const ChildProcessData& data,
+                                          int exit_code) {}
 
   // Called when an instance of a particular child is created in a page. If one
   // page contains several regions rendered by the same child, this will be
   // called once for each region during the page load.
   virtual void BrowserChildProcessInstanceCreated(
       const ChildProcessData& data) {}
 
  protected:
   // The observer can be destroyed on any thread.
   virtual ~BrowserChildProcessObserver() {}
 
   static void Add(BrowserChildProcessObserver* observer);
   static void Remove(BrowserChildProcessObserver* observer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_