Prefetching: Introduce store commands abstractions to be used by tasks.

components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc

Index: components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc
diff --git a/components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc b/components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc
index ae20c6239da74ffa9e481a3a30ab8236bc0dad85..59dfc5ff4e3099056fd99fa5db5d66dad7267260 100644
--- a/components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc
+++ b/components/offline_pages/core/prefetch/prefetch_dispatcher_impl.cc
@@ -13,6 +13,7 @@
 #include "components/offline_pages/core/offline_page_feature.h"
 #include "components/offline_pages/core/prefetch/add_unique_urls_task.h"
 #include "components/offline_pages/core/prefetch/prefetch_service.h"
+#include "components/offline_pages/core/prefetch/store/prefetch_store_command_factory.h"
 #include "url/gurl.h"
 
 namespace offline_pages {
@@ -34,12 +35,16 @@ void PrefetchDispatcherImpl::SetService(PrefetchService* service) {
 }
 
 void PrefetchDispatcherImpl::AddCandidatePrefetchURLs(
+    const std::string& name_space,
     const std::vector<PrefetchURL>& prefetch_urls) {
   if (!IsPrefetchingOfflinePagesEnabled())
     return;
 
+  PrefetchStoreCommandFactory* command_factory =
+      service_->GetPrefetchStoreCommandFactory();
   std::unique_ptr<Task> add_task = base::MakeUnique<AddUniqueUrlsTask>(
-      service_->GetPrefetchStore(), prefetch_urls);
+      command_factory->createAddUrls(), command_factory->createCleanupZombies(),
+      name_space, prefetch_urls);
   task_queue_.AddTask(std::move(add_task));
 }