Bring RFH/RVH unit tests closer to reality of how RF/RV are initialized

content/test/web_contents_observer_sanity_checker.h

 // Copyright 2014 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_WEB_CONTENTS_OBSERVER_SANITY_CHECKER_H_
 #define CONTENT_TEST_WEB_CONTENTS_OBSERVER_SANITY_CHECKER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 73 matching lines @@
   ~WebContentsObserverSanityChecker() override;
 
   std::string Format(RenderFrameHost* render_frame_host);
   void AssertRenderFrameExists(RenderFrameHost* render_frame_host);
   void AssertMainFrameExists();
 
   std::set<std::pair<int, int>> current_hosts_;
   std::set<std::pair<int, int>> live_routes_;
   std::set<std::pair<int, int>> deleted_routes_;
 
+  base::hash_map<std::pair<int, int>, std::string> render_frame_created_stacks_;
+  base::hash_map<std::pair<int, int>, std::string> render_frame_deleted_stacks_;
+
   bool web_contents_destroyed_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserverSanityChecker);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_WEB_CONTENTS_OBSERVER_SANITY_CHECKER_H_