Provide WebContents::CreateParams to tab helpers.

extensions/browser/guest_view/web_view/web_view_guest.h

Index: extensions/browser/guest_view/web_view/web_view_guest.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.h b/extensions/browser/guest_view/web_view/web_view_guest.h
index 72d3fb00603f2cb23d2334e6f375e50aea0f47e2..54e72bdd6a9cf151b3b9514957ac15ea0165b90c 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest.h
@@ -15,6 +15,7 @@
 #include "content/public/browser/javascript_dialog_manager.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_contents.h"
 #include "extensions/browser/guest_view/web_view/javascript_dialog_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_find_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
@@ -241,12 +242,15 @@ class WebViewGuest : public guest_view::GuestView<WebViewGuest>,
   content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) final;
-  void WebContentsCreated(content::WebContents* source_contents,
-                          int opener_render_process_id,
-                          int opener_render_frame_id,
-                          const std::string& frame_name,
-                          const GURL& target_url,
-                          content::WebContents* new_contents) final;
+  void WebContentsCreated(
+      content::WebContents* source_contents,
+      int opener_render_process_id,
+      int opener_render_frame_id,
+      const std::string& frame_name,
+      const GURL& target_url,
+      content::WebContents* new_contents,
+      const base::Optional<content::WebContents::CreateParams>& create_params)
+      final;
   void EnterFullscreenModeForTab(content::WebContents* web_contents,
                                  const GURL& origin) final;
   void ExitFullscreenModeForTab(content::WebContents* web_contents) final;