Convert SetContentSettingRules to use mojo, part 1/2.

chrome/common/OWNERS

 per-file chrome_features.cc=*
 per-file chrome_features.h=*
 per-file chrome_switches.cc=*
 per-file chrome_switches.h=*
 per-file pref_names.cc=*
 per-file pref_names.h=*
 per-file url_constants.cc=*
 per-file url_constants.h=*
 
 # This is for the common case of adding or renaming files. If you're doing
 # structural changes, use usual OWNERS rules.
 per-file BUILD.gn=*
 
 # Mac Sandbox profiles.
 per-file nacl_loader.sb=set noparent
 per-file nacl_loader.sb=rsesek@chromium.org
 
 per-file *_messages*.h=set noparent
 per-file *_messages*.h=file://ipc/SECURITY_OWNERS
 
 per-file *_param_traits*.*=set noparent
 per-file *_param_traits*.*=file://ipc/SECURITY_OWNERS
 
+per-file *_struct_traits*.*=set noparent
+per-file *_struct_traits*.*=file://ipc/SECURITY_OWNERS
+
 per-file *_type_converter*.*=set noparent
 per-file *_type_converter*.*=file://ipc/SECURITY_OWNERS
 
 # Changes to Mojo interfaces require a security review to avoid
 # introducing new sandbox escapes.
 per-file *.mojom=set noparent
 per-file *.mojom=file://ipc/SECURITY_OWNERS
 
 #Content settings
 per-file content_settings*=markusheintz@chromium.org
 
 # Pepper files.
 per-file pepper_*=bbudge@chromium.org
 per-file pepper_*=raymes@chromium.org
 
 # Other stuff.
 per-file autocomplete_match_type.*=mpearson@chromium.org
 per-file autocomplete_match_type.*=pkasting@chromium.org
 per-file autocomplete_match_type.*=sky@chromium.org
 per-file crash_keys*=rsesek@chromium.org
 
 # Tracing
 per-file trace_event_args_whitelist*=nduca@chromium.org
 per-file trace_event_args_whitelist*=dsinclair@chromium.org
 per-file trace_event_args_whitelist*=oysteine@chromium.org