Fix gn_all build on gcc 4.8

chrome/browser/ui/views/first_run_bubble.cc

Index: chrome/browser/ui/views/first_run_bubble.cc
diff --git a/chrome/browser/ui/views/first_run_bubble.cc b/chrome/browser/ui/views/first_run_bubble.cc
index 2a71452cc5ea43feb78938da3658a7468cc5b208..039fb3e05e5a15c3951488fff57895cc5fe61469 100644
--- a/chrome/browser/ui/views/first_run_bubble.cc
+++ b/chrome/browser/ui/views/first_run_bubble.cc
@@ -50,8 +50,8 @@ void FirstRunBubble::Init() {
   // TODO(tapted): Update these when there are mocks. http://crbug.com/699338.
   views::Label* title = new views::Label(
       l10n_util::GetStringFUTF16(IDS_FR_BUBBLE_TITLE, search_engine_name),
-      {original_font_list.Derive(2, gfx::Font::NORMAL,
-                                 gfx::Font::Weight::BOLD)});
+      views::Label::CustomFont{original_font_list.Derive(
+          2, gfx::Font::NORMAL, gfx::Font::Weight::BOLD)});
 
   views::Link* change =
       new views::Link(l10n_util::GetStringUTF16(IDS_FR_BUBBLE_CHANGE));