call static SequencedWorkerPool::GetSequenceToken() method directly
Followup to https://codereview.chromium.org/1414793009/ in order
to avoid a GCC unused result warning.
SequencedWorkerPool::GetSequenceToken() is now a static method, GCC
emits a warning for BrowserThread::GetBlockingPool()->GetSequenceToken()
since the return value of BrowserThread::GetBlockingPool() is not
used. We should just all the static method directly.
Review URL: https://codereview.chromium.org/1567983003
Cr-Commit-Position: refs/heads/master@{#368326}
4 files changed
