This adds some plumbing for propagating the reason for a renderer's death

chrome/browser/gpu_process_host.h

 // Copyright (c) 2010 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_GPU_PROCESS_HOST_H_
 #define CHROME_BROWSER_GPU_PROCESS_HOST_H_
 #pragma once
 
 #include <queue>
 
@@ skipping 97 matching lines @@
   void SendSynchronizationReply(IPC::Message* reply,
                                 ResourceMessageFilter* filter);
 
   // ResourceDispatcherHost::Receiver implementation:
   virtual URLRequestContext* GetRequestContext(
       uint32 request_id,
       const ViewHostMsg_Resource_Request& request_data);
 
   virtual bool CanShutdown();
   virtual void OnChildDied();
-  virtual void OnProcessCrashed();
+  virtual void OnProcessCrashed(int exit_code);
 
   bool CanLaunchGpuProcess() const;
   bool LaunchGpuProcess();
 
   bool initialized_;
   bool initialized_successfully_;
 
   // These are the channel requests that we have already sent to
   // the GPU process, but haven't heard back about yet.
   std::queue<ChannelRequest> sent_requests_;
 
   // The pending synchronization requests we need to reply to.
   std::queue<SynchronizationRequest> queued_synchronization_replies_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
 };
 
 #endif  // CHROME_BROWSER_GPU_PROCESS_HOST_H_