[Offline Pages] Snapshotting on timeout of last retry.

components/offline_pages/core/background/offliner.h

Index: components/offline_pages/core/background/offliner.h
diff --git a/components/offline_pages/core/background/offliner.h b/components/offline_pages/core/background/offliner.h
index a7a5718596cc1c89d7d29e26c13aa21730241d24..c2cf768fa75c2a7f154028abd0a7a7d7bf7d4775 100644
--- a/components/offline_pages/core/background/offliner.h
+++ b/components/offline_pages/core/background/offliner.h
@@ -75,6 +75,10 @@ class Offliner {
   // CompletionCallback.
   virtual void Cancel() = 0;
 
+  // Handles timeout scenario. Returns true if lowbar is met and try to do a
+  // snapshot of the current webcontents.
+  virtual bool HandleTimeout(const SavePageRequest& request) = 0;
+
   // TODO(dougarnett): add policy support methods.
 };