[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 98dc9126b1fae0fc1bea3b656f280da7646333d2..1569917aebe4a09184c52c6ee6249f4024ceeca4 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"
 
@@ -59,6 +60,11 @@ struct RenderPageInfo {
   base::Time render_time;
 };
 
+// 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_