Remove redundant computations on combined interface block counts This patch intends to remove redundant computations on combined interface block counts in ValidateGraphicsInterfaceBlocks. In this patch, we compute and check the number of combined interface blocks by the result of ValidateInterfaceBlocksCount directly instead of re-compute it, and if the check on max combined interface blocks failed, Program::link() can early return without entering ValidateGraphicsInterfaceBlocks. BUG=angleproject:2345 Change-Id: I7573f7c645993b4d75230a8471203a305127f2a3 Reviewed-on: https://chromium-review.googlesource.com/1031852 Reviewed-by: Jiajia Qin <jiajia.qin@intel.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>