[Offline Pages] Snapshotting on timeout of last retry.

chrome/browser/android/offline_pages/background_loader_offliner.h

Index: chrome/browser/android/offline_pages/background_loader_offliner.h
diff --git a/chrome/browser/android/offline_pages/background_loader_offliner.h b/chrome/browser/android/offline_pages/background_loader_offliner.h
index 0240e148d03c8de83ab838cd1b7b13edd06067de..ea51bfb91bad3e2f7b63c85292f7d40267ddb99e 100644
--- a/chrome/browser/android/offline_pages/background_loader_offliner.h
+++ b/chrome/browser/android/offline_pages/background_loader_offliner.h
@@ -38,6 +38,7 @@ class BackgroundLoaderOffliner : public Offliner,
   bool LoadAndSave(const SavePageRequest& request,
                    const CompletionCallback& callback) override;
   void Cancel() override;
+  bool HandleTimeout(const SavePageRequest& request) override;
 
   // WebContentsObserver implementation.
   void DidStopLoading() override;