Revert "Revert "renderergl_utils: Require explicit location qualifier for OpenGLES3"" This reverts commit 45a7d64fd84a7cb292ff71890a61f8d2b7609aa4. Change-Id: I7f94609fc7cf14220d98c61e73a13311d3cc4ecd Reviewed-on: https://chromium-review.googlesource.com/311245 Tryjob-Request: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>