Remove ShellContentRendererClient::ShouldFork.

This only checked for the kContentShellAlwaysFork switch, which seems
to be unused.

Bug: 883549
Change-Id: Ib9e5e9df79caaa0e2d6cda8457b84cf4d391064c
Reviewed-on: https://chromium-review.googlesource.com/1226462
Reviewed-by: Ɓukasz Anforowicz <lukasza@chromium.org>
Commit-Queue: Alex Moshchuk <alexmos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591509}
4 files changed