Add unit test and supporting code to test process overflow case.

chrome/chrome_tests.gypi

 # 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.
 
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_dll_resource.h',
       'common/pref_names.cc',
       'common/pref_names.h',
@@ skipping 1429 matching lines @@
         'browser/extensions/stubs_apitest.cc',
         'browser/find_bar_host_browsertest.cc',
         'browser/first_run_browsertest.cc',
         'browser/geolocation/access_token_store_browsertest.cc',
         'browser/geolocation/geolocation_browsertest.cc',
         'browser/gtk/view_id_util_browsertest.cc',
         'browser/net/cookie_policy_browsertest.cc',
         'browser/net/ftp_browsertest.cc',
         'browser/printing/print_dialog_cloud_uitest.cc',
         'browser/renderer_host/test/web_cache_manager_browsertest.cc',
+        'browser/renderer_host/test/render_process_host_browsertest.cc',
         'browser/renderer_host/test/render_view_host_manager_browsertest.cc',
         'browser/sessions/session_restore_browsertest.cc',
         'browser/ssl/ssl_browser_tests.cc',
         'browser/task_manager_browsertest.cc',
         'browser/views/browser_actions_container_browsertest.cc',
         'renderer/form_autocomplete_browsertest.cc',
         'test/automation/dom_automation_browsertest.cc',
         'test/in_process_browser_test.cc',
         'test/in_process_browser_test.h',
         'test/render_view_test.cc',
@@ skipping 1105 matching lines @@
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }
 
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