Update Google Benchmark library

llvm-svn: 322812
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 1903976d37868f8e13e60e44b77a71b5ede04bed
diff --git a/benchmarks/util_smartptr.bench.cpp b/benchmarks/util_smartptr.bench.cpp
index ad3f03a..c984b2c 100644
--- a/benchmarks/util_smartptr.bench.cpp
+++ b/benchmarks/util_smartptr.bench.cpp
@@ -9,7 +9,7 @@
 
 #include <memory>
 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 
 static void BM_SharedPtrCreateDestroy(benchmark::State& st) {
   while (st.KeepRunning()) {
@@ -39,4 +39,4 @@
 }
 BENCHMARK(BM_WeakPtrIncDecRef);
 
-BENCHMARK_MAIN()
+BENCHMARK_MAIN();