Fixes for turning on offliner request.

chrome/browser/android/offline_pages/prerendering_offliner.h

 // Copyright 2016 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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_
 #define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_
 
 #include <memory>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 55 matching lines @@
   PrerenderingLoader* GetOrCreateLoader();
   void SetPendingRequest(int64_t request_id);
   void ClearPendingRequest();
 
   // Not owned.
   content::BrowserContext* browser_context_;
   // Not owned.
   OfflinePageModel* offline_page_model_;
   // Lazily created.
   std::unique_ptr<PrerenderingLoader> loader_;
-  // Tracks pending request, if any. Not owned.
+  // Tracks pending request, if any. Owned copy.
   // May be used to ensure a callback applies to the pending request (e.g., in
   // case we receive a save page callback for an old, canceled request).
-  SavePageRequest const* pending_request_;
+  std::unique_ptr<SavePageRequest> pending_request_;
   base::WeakPtrFactory<PrerenderingOffliner> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderingOffliner);
 };
 
 }  // namespace offline_pages
 
 #endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_PRERENDERING_OFFLINER_H_