Provide WebContents::CreateParams to tab helpers.

chrome/browser/page_load_metrics/metrics_web_contents_observer.h

Index: chrome/browser/page_load_metrics/metrics_web_contents_observer.h
diff --git a/chrome/browser/page_load_metrics/metrics_web_contents_observer.h b/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
index 4f794b818a078c296bd08cc7c5a93a7189aaefc7..60ace4ec730cebd9f684c9790857f4e03fdb6e91 100644
--- a/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
+++ b/chrome/browser/page_load_metrics/metrics_web_contents_observer.h
@@ -76,9 +76,11 @@ class MetricsWebContentsObserver
   // Note that the returned metrics is owned by the web contents.
   static MetricsWebContentsObserver* CreateForWebContents(
       content::WebContents* web_contents,
+      const base::Optional<content::WebContents::CreateParams>& create_params,
       std::unique_ptr<PageLoadMetricsEmbedderInterface> embedder_interface);
   MetricsWebContentsObserver(
       content::WebContents* web_contents,
+      const base::Optional<content::WebContents::CreateParams>& create_params,
       std::unique_ptr<PageLoadMetricsEmbedderInterface> embedder_interface);
   ~MetricsWebContentsObserver() override;