switch to SQL for metadata storage.

chrome/browser/android/offline_pages/offline_page_model_factory.cc

Index: chrome/browser/android/offline_pages/offline_page_model_factory.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_model_factory.cc b/chrome/browser/android/offline_pages/offline_page_model_factory.cc
index 1afa51db5098b9654405b4dddca50c7fac98168c..8eccae0958d35717d4761c4363b93b882437727b 100644
--- a/chrome/browser/android/offline_pages/offline_page_model_factory.cc
+++ b/chrome/browser/android/offline_pages/offline_page_model_factory.cc
@@ -14,7 +14,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
-#include "components/offline_pages/offline_page_metadata_store_impl.h"
+#include "components/offline_pages/offline_page_metadata_store_sql.h"
 #include "components/offline_pages/offline_page_model.h"
 #include "components/offline_pages/proto/offline_pages.pb.h"
 #include "content/public/browser/browser_thread.h"
@@ -48,8 +48,8 @@ KeyedService* OfflinePageModelFactory::BuildServiceInstanceFor(
 
   base::FilePath store_path =
       profile->GetPath().Append(chrome::kOfflinePageMetadataDirname);
-  std::unique_ptr<OfflinePageMetadataStoreImpl> metadata_store(
-      new OfflinePageMetadataStoreImpl(background_task_runner, store_path));
+  std::unique_ptr<OfflinePageMetadataStore> metadata_store(
+      new OfflinePageMetadataStoreSQL(background_task_runner, store_path));
 
   base::FilePath archives_dir =
       profile->GetPath().Append(chrome::kOfflinePageArchviesDirname);