Fix WebStateTest.CallLoadURLWithParamsDuringSessionRestore test

It is possible that the committed URL is still the placeholder
URL in case of a restoration of when loading an offline page.
In that case, the domain check must extract the real URL from the
placeholder.

Bug: 1067733
Change-Id: Ieceaa41bc83ce519c2ef1920c3ff59d2e4f15ea3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632964
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845117}

ios/web/web_state/ui/crw_web_controller.mm

@@ -977,8 +977,13 @@ typedef void (^ViewportStateCompletion)(const web::PageViewportState*);
     GURL documentOrigin = newURL.GetOrigin();
     web::NavigationItem* committedItem =
         self.webStateImpl->GetNavigationManager()->GetLastCommittedItem();
-    GURL committedOrigin =
-        committedItem ? committedItem->GetURL().GetOrigin() : GURL::EmptyGURL();
+    GURL committedURL =
+        committedItem ? committedItem->GetURL() : GURL::EmptyGURL();
+    if (!base::FeatureList::IsEnabled(web::features::kUseJSForErrorPage) &&
+        IsPlaceholderUrl(committedURL)) {
+      committedURL = ExtractUrlFromPlaceholderUrl(committedURL);
+    }
+    GURL committedOrigin = committedURL.GetOrigin();
     DCHECK_EQ(documentOrigin, committedOrigin)
         << "Old and new URL detection system have a mismatch";