This method will no longer end the RenderPass in a following CL.
Renaming it in a split CL makes the review diff simple.

Bug: angleproject:4911
Change-Id: Id48257884dccb7c86f7de2cc9ca95e651fb68df7
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2340788
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>