Upgrading Mesa to 9.0.3

third_party/mesa/generate_git_sha1.py

+import os
+import os.path
+import sys
+
+output = sys.argv[1]
+parentdir = os.path.abspath(os.path.join(output, os.pardir))
+
+#The original body of this file is generated by this bash script:
+#
+#touch "${DIR}/git_sha1.h.tmp"
+#if test -d .git; then \
+#               if which git > /dev/null; then \
+#                   git log -n 1 --oneline | \
+#                       sed 's/^\([^ ]*\) .*/#define MESA_GIT_SHA1 "git-\1"/' \
+#                       > "${DIR}/git_sha1.h.tmp" ; \
+#               fi \
+#       fi
+#if ! cmp -s "${DIR}/git_sha1.h.tmp" "${DIR}/git_sha1.h"; then \
+#               mv "${DIR}/git_sha1.h.tmp" "${DIR}/git_sha1.h" ;\
+#       else \
+#               rm "${DIR}/git_sha1.h.tmp" ;\
+#       fi
+#
+#However, Chromium shouldn't depend on Bash, and this preprocessor macro isn't
+#neccessary in the first place
+
+if not os.path.isdir(parentdir):
+  os.makedirs(parentdir)
+
+with open(output, "w") as f:
+  pass