Merge commit '55c543272667022808c0ca3ac8c6006a1337de9f' as 'third_party/google-benchmark'

Change-Id: Ie16a1447cdda711c30436e014cd41804b9fd7c5b
diff --git a/third_party/google-benchmark/.clang-format b/third_party/google-benchmark/.clang-format
new file mode 100644
index 0000000..4b3f13f
--- /dev/null
+++ b/third_party/google-benchmark/.clang-format
@@ -0,0 +1,5 @@
+---
+Language:        Cpp
+BasedOnStyle:  Google
+...
+