Add DumpWithoutCrashing in RendererDidNavigateToExistingPage

This is intended to be reverted after investigating the linked bug.

BUG=688425
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2701523004
Cr-Commit-Position: refs/heads/master@{#450900}
void NavigationControllerImpl::SetNeedsReload() {
  needs_reload_ = true;

  if (last_committed_entry_index_ != -1) {
    entries_[last_committed_entry_index_]->SetTransitionType(
        ui::PAGE_TRANSITION_RELOAD);
  }
}

void NavigationControllerImpl::SetNeedsReload() {
  needs_reload_ = true;

  if (last_committed_entry_index_ != -1) {
    entries_[last_committed_entry_index_]->SetTransitionType(
        ui::PAGE_TRANSITION_RELOAD);
  }
}
