Fixes for turning on offliner request.

chrome/browser/android/offline_pages/prerendering_offliner.h

Index: chrome/browser/android/offline_pages/prerendering_offliner.h
diff --git a/chrome/browser/android/offline_pages/prerendering_offliner.h b/chrome/browser/android/offline_pages/prerendering_offliner.h
index 75376ac6e6723163408834b51cb15afc493f229d..ad74af1458133bf5b9f7308ba9abc35b5868fcb1 100644
--- a/chrome/browser/android/offline_pages/prerendering_offliner.h
+++ b/chrome/browser/android/offline_pages/prerendering_offliner.h
@@ -73,10 +73,10 @@ class PrerenderingOffliner : public Offliner {
   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);