Rename syncRendererState methods to syncImplementationState. BUG=angleproject:2107 Change-Id: I45b914a6edf721c6ec53ca2bc6e139685b059d20 Reviewed-on: https://chromium-review.googlesource.com/957271 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>