Manually update google_benchmark

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/e539e80..db2de74

Fix pedantic compilation flag violation (#1156) (Mariusz Wachowicz)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/db2de74

fix version recorded in releases (#1047) (Kai Germaschewski)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/a4bcd93

Implementation of random interleaving.  (#1105) (haih-g)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/a6a738c

remove appveyor and add libera.chat as IRC resource (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/c983c3e

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Bug: chromium:1213169
Change-Id: Ic89fd04b6f121e8997b54dcbbbd4a43b2ce8ecb8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2919959Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74812}

DEPS

@@ -195,7 +195,7 @@ deps = {
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + 'a3460d1aeeaa43fdf137a6adefef10ba0b59fe4b',
   'third_party/google_benchmark/src': {
-    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + 'e539e807daa0bc779bb6768b33ee4747624b4ec9',
+    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + 'db2de74cc8c34131a6f673e35751935cc1897a0d',
   },
   'third_party/jinja2':
     Var('chromium_url') + '/chromium/src/third_party/jinja2.git' + '@' + '6906af9d94ae10e895af4b7d07a34206e8de1424',

third_party/google_benchmark/BUILD.gn

@@ -18,6 +18,8 @@ if (v8_enable_google_benchmark) {
     sources = [
       "src/src/arraysize.h",
       "src/src/benchmark.cc",
+      "src/src/benchmark_adjust_repetitions.cc",
+      "src/src/benchmark_adjust_repetitions.h",
       "src/src/benchmark_api_internal.cc",
       "src/src/benchmark_api_internal.h",
       "src/src/benchmark_name.cc",
@@ -36,6 +38,7 @@ if (v8_enable_google_benchmark) {
       "src/src/counter.cc",
       "src/src/counter.h",
       "src/src/csv_reporter.cc",
+      "src/src/cycleclock.h",
       "src/src/internal_macros.h",
       "src/src/json_reporter.cc",
       "src/src/log.h",