Service CreateNewWindow on the UI thread with a new mojo interface

content/browser/frame_host/interstitial_page_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 101 matching lines @@
   void UpdateTitle(RenderFrameHost* render_frame_host,
                    const base::string16& title,
                    base::i18n::TextDirection title_direction) override;
   InterstitialPage* GetAsInterstitialPage() override;
   AccessibilityMode GetAccessibilityMode() const override;
   void Cut() override;
   void Copy() override;
   void Paste() override;
   void SelectAll() override;
   void CreateNewWindow(
-      SiteInstance* source_site_instance,
+      RenderFrameHost* opener,
       int32_t render_view_route_id,
       int32_t main_frame_route_id,
       int32_t main_frame_widget_route_id,
       const mojom::CreateNewWindowParams& params,
       SessionStorageNamespace* session_storage_namespace) override;
   void ShowCreatedWindow(int process_id,
                          int main_frame_widget_route_id,
                          WindowOpenDisposition disposition,
                          const gfx::Rect& initial_rect,
                          bool user_gesture) override;
@@ skipping 168 matching lines @@
   scoped_refptr<SessionStorageNamespace> session_storage_namespace_;
 
   base::WeakPtrFactory<InterstitialPageImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_INTERSTITIAL_PAGE_IMPL_H_