Assert that new renderer processes aren't created during shutdown.

content/browser/renderer_host/render_process_host.cc

 // Copyright (c) 2011 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/renderer_host/render_process_host.h"
 
 #include "base/command_line.h"
 #include "base/rand_util.h"
 #include "base/sys_info.h"
+#include "content/browser/browser_main.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/content_browser_client.h"
 #include "content/browser/webui/web_ui_factory.h"
 #include "content/common/child_process_info.h"
 #include "content/common/content_client.h"
 #include "content/common/content_constants.h"
 #include "content/common/content_switches.h"
 #include "content/common/notification_service.h"
 
@@ skipping 73 matching lines @@
 
 RenderProcessHost::RenderProcessHost(content::BrowserContext* browser_context)
     : max_page_id_(-1),
       fast_shutdown_started_(false),
       deleting_soon_(false),
       pending_views_(0),
       id_(ChildProcessInfo::GenerateChildProcessUniqueId()),
       browser_context_(browser_context),
       sudden_termination_allowed_(true),
       ignore_input_events_(false) {
+  CHECK(!content::ExitedMainMessageLoop());
   all_hosts.AddWithID(this, id());
   all_hosts.set_check_on_null_data(true);
   // Initialize |child_process_activity_time_| to a reasonable value.
   mark_child_process_activity_time();
 }
 
 RenderProcessHost::~RenderProcessHost() {
   // In unit tests, Release() might not have been called.
   if (all_hosts.Lookup(id()))
     all_hosts.Remove(id());
@@ skipping 121 matching lines @@
 
   // Now pick a random suitable renderer, if we have any.
   if (!suitable_renderers.empty()) {
     int suitable_count = static_cast<int>(suitable_renderers.size());
     int random_index = base::RandInt(0, suitable_count - 1);
     return suitable_renderers[random_index];
   }
 
   return NULL;
 }