Fix is in CQ: https://chromium-review.googlesource.com/c/chromium/src/+/1072347

Moving to P2 in sheriff queue with fix in CQ, thanks

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/772299899d46dcfa4171b2e60e11cb097b3ddf0c

commit 772299899d46dcfa4171b2e60e11cb097b3ddf0c
Author: Sebastien Marchand <sebmarchand@chromium.org>
Date: Thu May 24 20:22:53 2018

Fix a static initializer issue in LocalSiteCharImpl.

TimeDeltaToInternalRepresentation can't return a constexpr because it
uses TimeDelta::InSeconds which can't be evaluated at compile time,
remove the |kZeroIntervalInternalRepresentation| value as this doesn't
provide any clear value here.

Bug:  773382 , 846431 
Change-Id: I6b2df260742c239cc664e8476c726d4ba15731dc
Reviewed-on: https://chromium-review.googlesource.com/1072347
Commit-Queue: Sébastien Marchand <sebmarchand@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561608}
[modify] https://crrev.com/772299899d46dcfa4171b2e60e11cb097b3ddf0c/chrome/browser/resource_coordinator/local_site_characteristics_data_impl.cc
[modify] https://crrev.com/772299899d46dcfa4171b2e60e11cb097b3ddf0c/chrome/browser/resource_coordinator/local_site_characteristics_data_impl.h

Mac bot is green again :)