Added code so renderer would cleanly exit.

content/browser/child_process_launcher.cc

 // 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.
 
 #include "content/browser/child_process_launcher.h"
 
 #include <utility>  // For std::pair.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process_util.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread.h"
+#include "chrome/common/chrome_switches.h"
 #include "content/common/chrome_descriptors.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
 
 #if defined(OS_WIN)
 #include "base/file_path.h"
 #include "content/common/sandbox_policy.h"
 #elif defined(OS_MACOSX)
@@ skipping 15 matching lines @@
 // parent class destructs, while still holding on to state that we need.
 class ChildProcessLauncher::Context
     : public base::RefCountedThreadSafe<ChildProcessLauncher::Context> {
  public:
   Context()
       : client_(NULL),
         client_thread_id_(BrowserThread::UI),
         termination_status_(base::TERMINATION_STATUS_NORMAL_TERMINATION),
         exit_code_(content::RESULT_CODE_NORMAL_EXIT),
         starting_(true),
-        terminate_child_on_shutdown_(true)
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
-        , zygote_(false)
+        zygote_(false)
 #endif
         {
+          terminate_child_on_shutdown_ = !CommandLine::ForCurrentProcess()->
+              HasSwitch(switches::kEnableRendererCleanExit);
   }
 
   void Launch(
 #if defined(OS_WIN)
       const FilePath& exposed_dir,
 #elif defined(OS_POSIX)
       bool use_zygote,
       const base::EnvironmentVector& environ,
       int ipcfd,
 #endif
@@ skipping 312 matching lines @@
       base::Bind(
           &ChildProcessLauncher::Context::SetProcessBackgrounded,
           GetHandle(), background));
 }
 
 void ChildProcessLauncher::SetTerminateChildOnShutdown(
   bool terminate_on_shutdown) {
   if (context_)
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }