Revert of Always set the navigation pending item for page reload.

ios/web/web_state/ui/crw_web_controller.mm

Index: ios/web/web_state/ui/crw_web_controller.mm
diff --git a/ios/web/web_state/ui/crw_web_controller.mm b/ios/web/web_state/ui/crw_web_controller.mm
index 22cf74091cb87c39d1f71c1955b0a191eea77c05..b08853eabb5849c1b0d164fb126dd5db04d28b66 100644
--- a/ios/web/web_state/ui/crw_web_controller.mm
+++ b/ios/web/web_state/ui/crw_web_controller.mm
@@ -1520,18 +1520,11 @@
     // Typically on PAGE_TRANSITION_CLIENT_REDIRECT.
     [[self sessionController] updatePendingItem:requestURL];
   } else {
-    // If this is a reload then there no need to create a new pending item,
-    // instead update the pending item to the last committed item.
-    if (PageTransitionCoreTypeIs(transition, ui::PAGE_TRANSITION_RELOAD)) {
-      self.sessionController.pendingItemIndex =
-          self.sessionController.lastCommittedItemIndex;
-    } else {
-      // A new session history entry needs to be created.
-      self.navigationManagerImpl->AddPendingItem(
-          requestURL, referrer, transition,
-          web::NavigationInitiationType::RENDERER_INITIATED,
-          web::NavigationManager::UserAgentOverrideOption::INHERIT);
-    }
+    // A new session history entry needs to be created.
+    self.navigationManagerImpl->AddPendingItem(
+        requestURL, referrer, transition,
+        web::NavigationInitiationType::RENDERER_INITIATED,
+        web::NavigationManager::UserAgentOverrideOption::INHERIT);
   }
   std::unique_ptr<web::NavigationContextImpl> context =
       web::NavigationContextImpl::CreateNavigationContext(
@@ -1986,11 +1979,6 @@
     BOOL isChromeScheme =
         web::GetWebClient()->IsAppSpecificURL(currentNavigationURL);
 
-    // Since this is implicit reload, no new pending item should be created, set
-    // the pending item index to the last committed item.
-    self.sessionController.pendingItemIndex =
-        self.sessionController.lastCommittedItemIndex;
-
     // Don't immediately load the web page if in overlay mode. Always load if
     // native.
     if (isChromeScheme || !_overlayPreviewMode) {
@@ -2032,10 +2020,6 @@
   _lastUserInteraction.reset();
   base::RecordAction(UserMetricsAction("Reload"));
   GURL url = self.currentNavItem->GetURL();
-  // Reloading shouldn't create create a new pending item, instead set the
-  // pending item index to the last committed item.
-  self.sessionController.pendingItemIndex =
-      self.sessionController.lastCommittedItemIndex;
   if ([self shouldLoadURLInNativeView:url]) {
     std::unique_ptr<web::NavigationContextImpl> navigationContext = [self
         registerLoadRequestForURL:url