[ios] Reduce access to private //ios/web API.

ios/chrome/browser/tabs/tab.mm

Index: ios/chrome/browser/tabs/tab.mm
diff --git a/ios/chrome/browser/tabs/tab.mm b/ios/chrome/browser/tabs/tab.mm
index 12d1af70971c561c5547940b178d535be5bd5263..6bb0c4ab49b34abb3b75b8b970a06213c483dd4f 100644
--- a/ios/chrome/browser/tabs/tab.mm
+++ b/ios/chrome/browser/tabs/tab.mm
@@ -1224,14 +1224,6 @@ void TabInfoBarObserver::OnInfoBarReplaced(infobars::InfoBar* old_infobar,
   [parentTabModel_ notifyTabChanged:self];
 }
 
-// Records the state (scroll position, form values, whatever can be
-// harvested) from the current page into the current session entry.
-- (void)recordStateInHistory {
-  // Link-loading prerender tab may not have correct zoom value during the load.
-  if (!self.isLinkLoadingPrerenderTab)
-    [self.webController recordStateInHistory];
-}
-
 // Records metric for the interface's orientation.
 - (void)recordInterfaceOrientation {
   switch ([[UIApplication sharedApplication] statusBarOrientation]) {