Tab Search: turn off flaky benchmark test before it's fixed

Bug: 1159462
Change-Id: I347539281db7a0fd16c0c5624e5744cba69f7bc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2596012Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Yuheng Huang <yuhengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837813}

tools/perf/benchmarks/benchmark_smoke_unittest.py

@@ -101,6 +101,7 @@ _BLACK_LIST_TEST_MODULES = {
 # The list of benchmark names to be excluded from our smoke tests.
 _BLACK_LIST_TEST_NAMES = [
     'memory.long_running_idle_gmail_background_tbmv2',
+    'tab_search', # crbug.com/1159462
     'tab_switching.typical_25',
     'UNSCHEDULED_oortonline_tbmv2',
     'webrtc',  # crbug.com/932036