This adds some plumbing for propagating the status and error code of a

chrome/browser/browser_child_process_host.h

 // Copyright (c) 2009 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 CHROME_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_
 #define CHROME_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_
 #pragma once
 
 #include <list>
 
@@ skipping 56 matching lines @@
   void Launch(
 #if defined(OS_WIN)
       const FilePath& exposed_dir,
 #elif defined(OS_POSIX)
       bool use_zygote,
       const base::environment_vector& environ,
 #endif
       CommandLine* cmd_line);
 
   // ChildProcessLauncher::Client implementation.
-  virtual void OnProcessLaunched() { }
+  virtual void OnProcessLaunched() {}
 
   // Derived classes can override this to know if the process crashed.
-  virtual void OnProcessCrashed() {}
+  // |exit_code| is the status returned when the process crashed (for
+  // posix, as returned from waitpid(), for Windows, as returned from
+  // GetExitCodeProcess()).
+  virtual void OnProcessCrashed(int exit_code) {}
 
-  virtual bool DidChildCrash();
+  // Derived classes can override this to know if the process was
+  // killed.  |exit_code| is the status returned when the process
+  // was killed (for posix, as returned from waitpid(), for Windows,
+  // as returned from GetExitCodeProcess()).
+  virtual void OnProcessWasKilled(int exit_code) {}
+
+  // Returns the termination status of a child.  |exit_code| is the
+  // status returned when the process exited (for posix, as returned
+  // from waitpid(), for Windows, as returned from
+  // GetExitCodeProcess()).  |exit_code| may be NULL.
+  virtual base::TerminationStatus GetChildTerminationStatus(int* exit_code);
 
   // Overrides from ChildProcessHost
   virtual void OnChildDied();
   virtual bool InterceptMessageFromChild(const IPC::Message& msg);
   virtual void Notify(NotificationType type);
   // Extends the base class implementation and removes this host from
   // the host list. Calls ChildProcessHost::ForceShutdown
   virtual void ForceShutdown();
 
  private:
   // By using an internal class as the ChildProcessLauncher::Client, we can
   // intercept OnProcessLaunched and do our own processing before
   // calling the subclass' implementation.
   class ClientHook : public ChildProcessLauncher::Client {
    public:
     explicit ClientHook(BrowserChildProcessHost* host);
     virtual void OnProcessLaunched();
    private:
     BrowserChildProcessHost* host_;
   };
   ClientHook client_;
   // May be NULL if this current process has no resource dispatcher host.
   ResourceDispatcherHost* resource_dispatcher_host_;
   scoped_ptr<ChildProcessLauncher> child_process_;
 };
 
 #endif  // CHROME_BROWSER_BROWSER_CHILD_PROCESS_HOST_H_
-