Fix content_shell with network service enabled not loading pages.

This regressed in my earlier cl r528763.

This is a reland of r547221.

Bug: 833612

Change-Id: I4c2649414d42773f2530e1abe5912a04fcd0ed9b
Reviewed-on: https://chromium-review.googlesource.com/1064702
Reviewed-by: Jay Civelli <jcivelli@chromium.org>
Commit-Queue: John Abd-El-Malek <jam@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560011}
ContentRendererClient* ShellMainDelegate::CreateContentRendererClient() {
  renderer_client_.reset(switches::IsRunWebTestsSwitchPresent()
                             ? new LayoutTestContentRendererClient
                             : new ShellContentRendererClient);

  return renderer_client_.get();
 }

ContentRendererClient* ShellMainDelegate::CreateContentRendererClient() {
  renderer_client_.reset(switches::IsRunWebTestsSwitchPresent()
                             ? new LayoutTestContentRendererClient
                             : new ShellContentRendererClient);

  return renderer_client_.get();
 }
