PlzNavigate: stop navigations when opening a document for write
This CL ensures that we stop renderer-initiated navigations when
attempting to do a document write. In order to do this in PlzNavigate,
we introduce a new IPC where the RenderFrame asks the browser process to
drop its renderer-initiated request. The CL also fixes an issue with the
cancellation of renderer-initiated navigations in PlzNavigate. We issued
a Stop IPC that would stop all loaders. Instead, we now have a new IPC
that will only cancel the dummy provisional DocumentLoader that keeps
track of navigations handled by the browser process.
BUG=576261
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
Review-Url: https://codereview.chromium.org/2735183003
Cr-Commit-Position: refs/heads/master@{#459081}
22 files changed
