Disable testExtraChromeCategories

Disable
benchmarks.blink_perf_unittest.BlinkPerfTest.testExtraChromeCategories
on Linux and CrOS due to flaky.

Bug: 1163628
Change-Id: I3b7093890b12e4e63eb2bdee5bf816d03f948015
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2626168
Auto-Submit: Owen Min <zmin@chromium.org>
Commit-Queue: Wenbin Zhang <wenbinzhang@google.com>
Reviewed-by: Wenbin Zhang <wenbinzhang@google.com>
Cr-Commit-Position: refs/heads/master@{#842925}

tools/perf/benchmarks/blink_perf_unittest.py

@@ -130,6 +130,8 @@ class BlinkPerfTest(legacy_page_test_case.LegacyPageTestCase):
     self.RunPageTest(self.blink_page_test, 'file://lifecycle-methods.html')
     self.assertFalse(self.HasChromeTraces())
 
+  @decorators.Disabled('linux',
+                       'chromeos')  # Disable due to flaky: crbug.com/1163628
   def testExtraChromeCategories(self):
     self.options.extra_chrome_categories = 'cc,blink'
     self.RunPageTest(self.blink_page_test, 'file://lifecycle-methods.html')