ES31: Allow function call, unary, ternary operators in SSBO When we meet function call, unary or ternary operator in SSBO access chain, we should transfer the process of them to OutputHLSL. Bug: angleproject:1951 Change-Id: I740940ac4eee4c5ed52239f14b1d32b1f9cf9385 Reviewed-on: https://chromium-review.googlesource.com/c/1290470 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jiajia Qin <jiajia.qin@intel.com>