Fix gn_all build on gcc 4.8

ui/views/controls/styled_label_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/styled_label.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 471 matching lines @@
       styled()->child_at(2)->GetTooltipText(gfx::Point(1, 1), &tooltip));
   EXPECT_EQ(ASCIIToUTF16("tooltip"), tooltip);
 }
 
 TEST_F(StyledLabelTest, SetBaseFontList) {
   const std::string text("This is a test block of text.");
   InitStyledLabel(text);
   std::string font_name("arial");
   gfx::Font font(font_name, 30);
   styled()->SetBaseFontList(gfx::FontList(font));
-  Label label(ASCIIToUTF16(text), {gfx::FontList(font)});
+  Label label(ASCIIToUTF16(text), Label::CustomFont{gfx::FontList(font)});
 
   styled()->SetBounds(0,
                       0,
                       label.GetPreferredSize().width(),
                       label.GetPreferredSize().height());
 
   // Make sure we have the same sizing as a label.
   EXPECT_EQ(label.GetPreferredSize().height(), styled()->height());
   EXPECT_EQ(label.GetPreferredSize().width(), styled()->width());
 }
@@ skipping 70 matching lines @@
   styled()->Layout();
   EXPECT_EQ(
       label_preferred_size.height() + 5 /*top border*/ + 6 /*bottom border*/,
       styled()->GetPreferredSize().height());
   EXPECT_EQ(
       label_preferred_size.width() + 10 /*left border*/ + 20 /*right border*/,
       styled()->GetPreferredSize().width());
 }
 
 }  // namespace views