[Offline Pages] Renaming metadata store test file.

components/offline_pages/core/BUILD.gn

Index: components/offline_pages/core/BUILD.gn
diff --git a/components/offline_pages/core/BUILD.gn b/components/offline_pages/core/BUILD.gn
index 21708d2b71c5ebea702bcafccd53f9037bce1f4e..3fbc1f8d14b374ba4779d4d598bec10849fb7e6e 100644
--- a/components/offline_pages/core/BUILD.gn
+++ b/components/offline_pages/core/BUILD.gn
@@ -20,7 +20,6 @@ static_library("core") {
     "offline_page_client_policy.h",
     "offline_page_item.cc",
     "offline_page_item.h",
-    "offline_page_metadata_store.cc",
     "offline_page_metadata_store.h",
     "offline_page_metadata_store_sql.cc",
     "offline_page_metadata_store_sql.h",
@@ -95,7 +94,7 @@ source_set("unit_tests") {
     "archive_manager_unittest.cc",
     "client_policy_controller_unittest.cc",
     "offline_event_logger_unittest.cc",
-    "offline_page_metadata_store_impl_unittest.cc",
+    "offline_page_metadata_store_unittest.cc",
     "offline_page_model_event_logger_unittest.cc",
     "offline_page_model_impl_unittest.cc",
     "offline_page_storage_manager_unittest.cc",