[Offline Prefetech] Send GetOperationReqest to the server

components/offline_pages/core/prefetch/prefetch_types.h

Index: components/offline_pages/core/prefetch/prefetch_types.h
diff --git a/components/offline_pages/core/prefetch/prefetch_types.h b/components/offline_pages/core/prefetch/prefetch_types.h
index c15b6a0e014dfa0d9e6dc45b2514ed8180e8e8c7..f36526dcc7f3463bc56ad40c21c23eabe7755251 100644
--- a/components/offline_pages/core/prefetch/prefetch_types.h
+++ b/components/offline_pages/core/prefetch/prefetch_types.h
@@ -5,6 +5,7 @@
 #ifndef COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_
 
+#include <vector>
 #include "base/macros.h"
 #include "base/time/time.h"
 
@@ -99,6 +100,11 @@ enum class PrefetchItemErrorCode {
   EXPIRED,
 };
 
+// Callback invoked upon completion of a prefetch request.
+using PrefetchRequestFinishedCallback =
+    base::Callback<void(PrefetchRequestStatus status,
+                        const std::vector<RenderPageInfo>& pages)>;
+
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_