sometimes detected test failure. flaky?

https://ci.chromium.org/buildbot/chromium.goma/Chromium%20Linux%20Goma%20GCE%20Staging/12345
base_unittests base_unittests
Run on OS: 'Ubuntu-14.04'
Shard duration: 27s
failures:
SysInfoTest.AmountOfAvailablePhysicalMemory

https://logs.chromium.org/v/?s=chromium%2Fbb%2Fchromium.goma%2FChromium_Linux_Goma_GCE_Staging%2F12345%2F%2B%2Frecipes%2Fsteps%2Fbase_unittests%2F0%2Flogs%2FSysInfoTest.AmountOfAvailablePhysicalMemory%2F0
 RUN      ] SysInfoTest.AmountOfAvailablePhysicalMemory
../../base/sys_info_unittest.cc:48: Failure
Expected: (amount) > (static_cast<int64_t>(info.free) * 1024), actual: 30640103424 vs 30697832448
[  FAILED  ] SysInfoTest.AmountOfAvailablePhysicalMemory (0 ms)
[ RUN      ] SysInfoTest.AmountOfAvailablePhysicalMemory
../../base/sys_info_unittest.cc:48: Failure
Expected: (amount) > (static_cast<int64_t>(info.free) * 1024), actual: 30667456512 vs 30727254016
[  FAILED  ] SysInfoTest.AmountOfAvailablePhysicalMemory (0 ms)
[ RUN      ] SysInfoTest.AmountOfAvailablePhysicalMemory
../../base/sys_info_unittest.cc:48: Failure
Expected: (amount) > (static_cast<int64_t>(info.free) * 1024), actual: 30667296768 vs 30727094272
[  FAILED  ] SysInfoTest.AmountOfAvailablePhysicalMemory (0 ms)
[ RUN      ] SysInfoTest.AmountOfAvailablePhysicalMemory
../../base/sys_info_unittest.cc:48: Failure
Expected: (amount) > (static_cast<int64_t>(info.free) * 1024), actual: 30667042816 vs 30726840320
[  FAILED  ] SysInfoTest.AmountOfAvailablePhysicalMemory (0 ms)