Added code for renderer to cleanly exit.

base/process_util.h

 // Copyright (c) 2012 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.
 
 // This file/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 #pragma once
 
 #include "base/basictypes.h"
+#if defined(RENDERER_CLEAN_EXIT)
+#include "base/atomicops.h"
+#endif // defined(RENDERER_CLEAN_EXIT)
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <tlhelp32.h>
 #elif defined(OS_MACOSX) || defined(OS_BSD)
 // kinfo_proc is defined in <sys/sysctl.h>, but this forward declaration
 // is sufficient for the vector<kinfo_proc> below.
 struct kinfo_proc;
 // malloc_zone_t is defined in <malloc/malloc.h>, but this forward declaration
 // is sufficient for GetPurgeableZone() below.
@@ skipping 809 matching lines @@
 // Restore the default exception handler, setting it to Apple Crash Reporter
 // (ReportCrash).  When forking and execing a new process, the child will
 // inherit the parent's exception ports, which may be set to the Breakpad
 // instance running inside the parent.  The parent's Breakpad instance should
 // not handle the child's exceptions.  Calling RestoreDefaultExceptionHandler
 // in the child after forking will restore the standard exception handler.
 // See http://crbug.com/20371/ for more details.
 void RestoreDefaultExceptionHandler();
 #endif  // defined(OS_MACOSX)
 
+#if defined(RENDERER_CLEAN_EXIT)
+extern base::subtle::Atomic32 exit_counter;
+
+BASE_EXPORT void clean_exit(int return_value) __attribute__((noreturn));
+#endif // defined(RENDERER_CLEAN_EXIT)
+
 }  // namespace base
 
 #endif  // BASE_PROCESS_UTIL_H_