[Offline Pages] Moves Coordinator to using MarkAttemptStarted/MarkAttemptCompleted API.

components/offline_pages/background/offliner.h

Index: components/offline_pages/background/offliner.h
diff --git a/components/offline_pages/background/offliner.h b/components/offline_pages/background/offliner.h
index 8bc6468af55a0f51565c935886665af2bb3cb7a0..7370091d5eb463454c5a463565637a3448dfc6fd 100644
--- a/components/offline_pages/background/offliner.h
+++ b/components/offline_pages/background/offliner.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_OFFLINER_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_OFFLINER_H_
 
+#include <string>
+
 #include "base/callback.h"
 
 namespace offline_pages {
@@ -39,6 +41,22 @@ class Offliner {
     STATUS_COUNT
   };
 
+  static std::string RequestStatusToString(RequestStatus request_status) {
+    switch (request_status) {
+      case UNKNOWN: return "UNKNOWN";
+      case LOADED: return "LOADED";
+      case SAVED: return "SAVED";
+      case REQUEST_COORDINATOR_CANCELED: return "REQUEST_COORDINATOR_CANCELED";
+      case PRERENDERING_CANCELED: return "PRERENDERING_CANCELED";
+      case PRERENDERING_FAILED: return "PRERENDERING_FAILED";
+      case SAVE_FAILED: return "SAVE_FAILED";
+      case FOREGROUND_CANCELED: return "FOREGROUND_CANCELED";
+      default:
+        DCHECK(false);
+        return "";
+    }
+  }
+
   // Reports the completion status of a request.
   // TODO(dougarnett): consider passing back a request id instead of request.
   typedef base::Callback<void(const SavePageRequest&, RequestStatus)>