Now that the NFL Draft is over and free agency has mostly been wrapped up it is a good time to look back at the depth charts of each position room to see where the San Francisco 49ers stand. What does the linebacker room look like heading into the summer months? San Francisco 49ers post-draft linebacker depth chart Fred Warner Warner is expected to return from his ankle surgery and be just fine this season. At his age and with the limited injury scares he has had in the past, most expectations are that he will continue to play at a high level. Dre Greenlaw The team feels they missed Greenlaw last year and signed him to replace Dee Winters, who they shipped off to Dallas . Greenlaw is better on paper, but was banged up coming off of his Achilles injury last season.  Luke Gifford Gifford has played the SAM role as the strong linebacker for Robert Saleh. It will be interesting to see if he holds the same role.…