PlzNavigate: use RenderFrameHostImpl::IsRendererTransferNeededForNavigation

Following this CL, PlzNavigate will use
RenderFrameHostImpl::IsRendererTransferNeededForNavigation to determine if a
renderer swap should happen when SitePerProcess is enabled.

BUG=475027
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review URL: https://codereview.chromium.org/1722623003

Cr-Commit-Position: refs/heads/master@{#377920}
4 files changed