Mark pending item as created from hash change if necessary.

This is needed because window.hashchange message may not arrive on time
and navigation will not be marked as "IsCreatedFromHashChange". This
will result in going through "loadURL" flow for the same document
navigaitons, which is not correct.

BUG=None

Review-Url: https://codereview.chromium.org/2898633003
Cr-Commit-Position: refs/heads/master@{#473729}

ios/web/web_state/ui/crw_web_controller.mm

@@ -1862,6 +1862,18 @@ registerLoadRequestForURL:(const GURL&)requestURL
       params.url, params.referrer, params.transition_type,
       navigationInitiationType, params.user_agent_override_option);
 
+  // Mark pending item as created from hash change if necessary. This is needed
+  // because window.hashchange message may not arrive on time.
+  web::NavigationItemImpl* pendingItem = self.sessionController.pendingItem;
+  if (pendingItem) {
+    GURL lastCommittedURL = _webStateImpl->GetLastCommittedURL();
+    GURL pendingURL = pendingItem->GetURL();
+    if (lastCommittedURL != pendingURL &&
+        lastCommittedURL.EqualsIgnoringRef(pendingURL)) {
+      pendingItem->SetIsCreatedFromHashChange(true);
+    }
+  }
+
   web::NavigationItemImpl* addedItem = self.currentNavItem;
   DCHECK(addedItem);
   if (params.extra_headers)