Remove usage of GetActiveEntry [16/n]

This CL is part of a serie of CLs to remove usage of the deprecated
method NavigationController::GetActiveEntry.

Bug: 273710
Change-Id: I98d76530c98b62f9c1a5cdd729aea52d39b13575
Reviewed-on: https://chromium-review.googlesource.com/1102679Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: Camille Lamy <clamy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#567980}

chrome/browser/captive_portal/captive_portal_tab_reloader.cc

@@ -266,7 +266,7 @@ void CaptivePortalTabReloader::ReloadTabIfNeeded() {
 
 void CaptivePortalTabReloader::ReloadTab() {
   content::NavigationController* controller = &web_contents_->GetController();
-  if (!controller->GetActiveEntry()->GetHasPostData())
+  if (!controller->GetLastCommittedEntry()->GetHasPostData())
     controller->Reload(content::ReloadType::NORMAL, true);
 }