WebView: Remove DoSetUpFieldTrials

Fold AwFieldTrialCreator::DoSetUpFieldTrials into
AwFieldTrialCreator::SetUpFieldTrials. The former is unnecessary since
AwFieldTrialCreator no longer requires the client ID, so
DoSetUpFieldTrials can no longer return early.

BUG=866722

Change-Id: Ibcce988656cabe57ed142abb14efbb163e0b3fb6
Reviewed-on: https://chromium-review.googlesource.com/1238485
Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Paul Miller <paulmiller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593397}
2 files changed