Service CreateNewWindow on the UI thread with a new mojo interface

content/test/test_web_contents.h

 // Copyright (c) 2012 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_TEST_TEST_WEB_CONTENTS_H_
 #define CONTENT_TEST_TEST_WEB_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 125 matching lines @@
       NavigationHandle* navigation_handle,
       std::unique_ptr<NavigationData> navigation_data) override;
 
  protected:
   // The deprecated WebContentsTester still needs to subclass this.
   explicit TestWebContents(BrowserContext* browser_context);
 
  private:
   // WebContentsImpl overrides
   void CreateNewWindow(
-      SiteInstance* source_site_instance,
+      RenderFrameHost* opener,
       int32_t 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 CreateNewWidget(int32_t render_process_id,
                        int32_t route_id,
                        blink::WebPopupType popup_type) override;
   void CreateNewFullscreenWidget(int32_t render_process_id,
                                  int32_t route_id) override;
@@ skipping 18 matching lines @@
   int expect_set_history_offset_and_length_history_length_;
   std::string save_frame_headers_;
   // Map keyed by image URL. Values are <id, callback> pairs.
   std::map<GURL, std::list<std::pair<int, ImageDownloadCallback>>>
       pending_image_downloads_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_WEB_CONTENTS_H_