[Offline pages] Adding persistent request queue based on SQLite

components/offline_pages/background/save_page_request.h

Index: components/offline_pages/background/save_page_request.h
diff --git a/components/offline_pages/background/save_page_request.h b/components/offline_pages/background/save_page_request.h
index 571eeae9464a0bd6335c51cce02c173c120ad519..650cb3c0ec3a28e79f37839213c696e3b7480d87 100644
--- a/components/offline_pages/background/save_page_request.h
+++ b/components/offline_pages/background/save_page_request.h
@@ -46,7 +46,7 @@ class SavePageRequest {
   void MarkAttemptStarted(const base::Time& start_time);
 
   // Marks attempt as completed and clears |last_attempt_time_|.
-  void MarkAttemptCompleted();
+  void MarkAttemptCompleted(const base::Time& time);
 
   int64_t request_id() const { return request_id_; }
 
@@ -59,6 +59,9 @@ class SavePageRequest {
   const base::Time& activation_time() const { return activation_time_; }
 
   int64_t attempt_count() const { return attempt_count_; }
+  void set_attempt_count(int64_t attempt_count) {
+    attempt_count_ = attempt_count;
+  }
 
   const base::Time& last_attempt_time() const { return last_attempt_time_; }