Do not interrupt session restoration with Stop or Reload.

Made Stop and Reload no-op during session restoration. For embedder
WebState should behave as idle during session restoration, so ignoring
Reload and Stop is fine. Reload will eventually happen after the
restoration is complete and stop should be actually no-op for an idle
WebState.

Bug: 877671
Change-Id: I14c4b1d06122aad03406510c9b3e3d57d80e5f93
Reviewed-on: https://chromium-review.googlesource.com/c/1354035
Reviewed-by: Danyao Wang <danyao@chromium.org>
Commit-Queue: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612342}
3 files changed