This class manages and suballocates buffers used to upload textures. It
maintains a reusable, suballocated buffer for small allocations, and
creates dedicated buffers for any allocation larger than its set
reusable buffer size.
Change-Id: If7877faed870afbc85635ae47553000fa3487aba
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/534941
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: James Godfrey-Kittle <jamesgk@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
f9c89a443d