Only return symbol from TSymbolTable::find Whether the symbol is built-in can be easily determined from the SymbolType stored in the symbol, it doesn't need to be returned separately. The sameScope value that could be returned from TSymbolTable::find was never used, so that can be removed as well. BUG=angleproject:2267 TEST=angle_unittests Change-Id: I06958741ebec67d496f830a83b4f6f1359632f45 Reviewed-on: https://chromium-review.googlesource.com/891021 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>