Update from https://crrev.com/312398

tools/gdb/gdb_chrome.py

 # 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.
 
 """GDB support for Chrome types.
 
 Add this to your gdb by amending your ~/.gdbinit as follows:
   python
   import sys
   sys.path.insert(0, "/path/to/tools/gdb/")
@@ skipping 265 matching lines @@
         return 'SiteInstanceImpl@%s for %s' % (
             self.val.address, self.val['site_'])
 
     def children(self):
         yield ('id_', self.val['id_'])
         yield ('has_site_', self.val['has_site_'])
         if self.val['browsing_instance_']['ptr_']:
             yield ('browsing_instance_', self.val['browsing_instance_']['ptr_'])
         if self.val['process_']:
             yield ('process_', typed_ptr(self.val['process_']))
-        if self.val['render_process_host_factory_']:
-            yield ('render_process_host_factory_',
-                   self.val['render_process_host_factory_'])
 pp_set.add_printer('content::SiteInstanceImpl', '^content::SiteInstanceImpl$',
                    SiteInstanceImplPrinter)
 
 
 class RenderProcessHostImplPrinter(object):
     def __init__(self, val):
         self.val = val.cast(val.dynamic_type)
 
     def to_string(self):
         pid = ''
@@ skipping 26 matching lines @@
         yield ('sudden_termination_allowed_',
                self.val['sudden_termination_allowed_'])
         yield ('ignore_input_events_', self.val['ignore_input_events_'])
         yield ('is_guest_', self.val['is_guest_'])
 pp_set.add_printer('content::RenderProcessHostImpl',
                    '^content::RenderProcessHostImpl$',
                    RenderProcessHostImplPrinter)
 
 
 gdb.printing.register_pretty_printer(gdb, pp_set, replace=_DEBUGGING)