Give the main frame a RenderWidget.

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 <string>
 
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 100 matching lines @@
                                 bool was_ignored_by_handler);
 
  protected:
   // The deprecated WebContentsTester still needs to subclass this.
   explicit TestWebContents(BrowserContext* browser_context);
 
  private:
   // WebContentsImpl overrides
   void CreateNewWindow(
       SiteInstance* source_site_instance,
-      int route_id,
-      int main_frame_route_id,
+      int32 route_id,
+      int32 main_frame_route_id,
+      int32 main_frame_widget_route_id,
       const ViewHostMsg_CreateWindow_Params& params,
       SessionStorageNamespace* session_storage_namespace) override;
   void CreateNewWidget(int render_process_id,
                        int route_id,
                        blink::WebPopupType popup_type) override;
   void CreateNewFullscreenWidget(int render_process_id, int route_id) override;
   void ShowCreatedWindow(int route_id,
                          WindowOpenDisposition disposition,
                          const gfx::Rect& initial_rect,
                          bool user_gesture) override;
   void ShowCreatedWidget(int route_id, const gfx::Rect& initial_rect) override;
   void ShowCreatedFullscreenWidget(int route_id) override;
   void SaveFrameWithHeaders(const GURL& url,
                             const Referrer& referrer,
                             const std::string& headers) override;
 
   RenderViewHostDelegateView* delegate_view_override_;
 
   // Expectations for arguments of |SetHistoryOffsetAndLength()|.
   bool expect_set_history_offset_and_length_;
   int expect_set_history_offset_and_length_history_offset_;
   int expect_set_history_offset_and_length_history_length_;
   std::string save_frame_headers_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_WEB_CONTENTS_H_