Refactoring startup logic for upcoming FRE changes (non-Win 10).

chrome/browser/ui/BUILD.gn

Index: chrome/browser/ui/BUILD.gn
diff --git a/chrome/browser/ui/BUILD.gn b/chrome/browser/ui/BUILD.gn
index dc233998ae017c7c4d5b06b677cf84b716e9819d..ddb2d1f9d00a10e280e27390adf8760e67eda349 100644
--- a/chrome/browser/ui/BUILD.gn
+++ b/chrome/browser/ui/BUILD.gn
@@ -790,8 +790,12 @@ split_static_library("ui") {
       "startup/startup_browser_creator.h",
       "startup/startup_browser_creator_impl.cc",
       "startup/startup_browser_creator_impl.h",
+      "startup/startup_features.cc",
+      "startup/startup_features.h",
       "startup/startup_tab.cc",
       "startup/startup_tab.h",
+      "startup/startup_tab_provider.cc",
+      "startup/startup_tab_provider.h",
       "startup/startup_types.h",
       "sync/browser_synced_window_delegate.cc",
       "sync/browser_synced_window_delegate.h",