AccessManager::checkNamedRoute() is not passing all route defaults (or building a complete route request)

Updated: Comment #N

Problem/Motivation

Trying to use AccessManager::checkNamedRoute() for menu links, some are not correctly checked, e.g. the /search link because the route attributes are not correctly populated.

This is important since it's needed to make sure route-based access checks work correctly in #2047633: Move definition of menu links to hook_menu_link_defaults(), decouple key name from path, and make 'parent' explicit

Proposed resolution

Figure out how to properly populate all request attributes using just the paramConverterManager. This is in the current patch.

OR - as a fallback approach that may be less performant - this was in the 1st patch, but not what we are doing in the current patch:

Alter AccessManager::checkNamedRoute() so that is builds a complete route like menu_item_route_access() currently does by using the full matcher.

Remaining tasks

figure out the best code

User interface changes

none

API changes

none