Navigation: Removed deprecated error functions TestRenderFrameHost.

This patch removes deprecated methods
RenderFrameHostTester::SimulateNavigationError and
SimulateNavigationErrorPageCommit as well as their remaining uses
in unit tests.

Bug: 728571
Change-Id: I8f1d6b825cf80aad0680c3fd95a283897b19ebe8
Reviewed-on: https://chromium-review.googlesource.com/c/1370175
Reviewed-by: Camille Lamy <clamy@chromium.org>
Commit-Queue: Arthur Hemery <ahemery@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615508}
4 files changed