Suspend shared timers while blockingly closing databases

BUG=388771
R=michaeln@chromium.org

Review URL: https://codereview.chromium.org/409863002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284785 0039d316-1c4b-4281-b951-d872f2087c98
void RenderThreadImpl::UpdateHistograms(int sequence_number) {
  child_histogram_message_filter()->SendHistograms(sequence_number);
}

void RenderThreadImpl::UpdateHistograms(int sequence_number) {
  child_histogram_message_filter()->SendHistograms(sequence_number);
}
