Use RenderbufferID in place of GLuint handles. This will allow frame capture/replay to more easily emulate object handle manipulation. It also provides a bit of type safety. Also generalizes ResourceMap to handle non-GLuint IDs. Bug: angleproject:3611 Change-Id: I174fd260f326e0dbe2aca3f818215c91d82cf48c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1706559 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>