[ios] Remove content filter blocking workaround on iOS13.

Bug: 954332
Change-Id: Ia8a590b912962b343e9fceb577875ef03f51a9b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1760267
Auto-Submit: Justin Cohen <justincohen@chromium.org>
Reviewed-by: Ali Juma <ajuma@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688103}

ios/web/web_view/wk_web_view_util.h

@@ -13,7 +13,7 @@ namespace web {
 bool IsSafeBrowsingWarningDisplayedInWebView(WKWebView* web_view);
 
 // Returns true if workaround for loading restricted URLs should be applied.
-// TODO(crbug.com/954332): Remove this workaround when
+// TODO(crbug.com/954332): Remove this workaround when iOS 12 is dropped.
 // https://bugs.webkit.org/show_bug.cgi?id=196930 is fixed.
 bool RequiresContentFilterBlockingWorkaround();
 

ios/web/web_view/wk_web_view_util.mm

@@ -37,6 +37,10 @@ bool RequiresContentFilterBlockingWorkaround() {
   if (!GetWebClient()->IsSlimNavigationManagerEnabled())
     return false;
 
+  // This is fixed in iOS13 beta 7.
+  if (@available(iOS 13, *))
+    return false;
+
   if (@available(iOS 12.2, *))
     return true;