[Offline Pages] Adds event logs for requests dropped due to number of start or complete attempts.

components/offline_pages/background/request_coordinator_event_logger.h

Index: components/offline_pages/background/request_coordinator_event_logger.h
diff --git a/components/offline_pages/background/request_coordinator_event_logger.h b/components/offline_pages/background/request_coordinator_event_logger.h
index 4ac05e89274d108644886a1172b830994bdef7ad..61a7beb94593c29fb6c46308471355e67dc7bb93 100644
--- a/components/offline_pages/background/request_coordinator_event_logger.h
+++ b/components/offline_pages/background/request_coordinator_event_logger.h
@@ -9,6 +9,7 @@
 #include <string>
 
 #include "components/offline_pages/background/offliner.h"
+#include "components/offline_pages/background/request_notifier.h"
 #include "components/offline_pages/background/request_queue.h"
 #include "components/offline_pages/offline_event_logger.h"
 
@@ -16,11 +17,17 @@ namespace offline_pages {
 
 class RequestCoordinatorEventLogger : public OfflineEventLogger {
  public:
-  // Records that a background task with SavePageRequest |request_id|
-  // has been updated.
-  void RecordSavePageRequestUpdated(const std::string& name_space,
-                                    Offliner::RequestStatus new_status,
-                                    int64_t request_id);
+  // Records the result of a background task attempt for SavePageRequest
+  // |request_id|.
+  void RecordOfflinerResult(const std::string& name_space,
+                            Offliner::RequestStatus new_status,
+                            int64_t request_id);
+
+  // Records the reason for dropped SavePageRequest |request_id|.
+  void RecordDroppedSavePageRequest(
+      const std::string& name_space,
+      RequestNotifier::BackgroundSavePageResult result,
+      int64_t request_id);
 
   void RecordUpdateRequestFailed(const std::string& name_space,
                                  RequestQueue::UpdateRequestResult result);