Update some secondary UI buttons to MD style.

chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc

Index: chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc
diff --git a/chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc b/chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc
index 11e868e010974ba6c1a26870e5f91d3749a113f5..0021d92218cb6a04befcfaf68ff1323a49f078a1 100644
--- a/chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc
+++ b/chrome/browser/ui/views/extensions/media_galleries_dialog_views.cc
@@ -19,7 +19,7 @@
 #include "ui/views/border.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/controls/button/image_button.h"
-#include "ui/views/controls/button/label_button.h"
+#include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/controls/scroll_view.h"
@@ -252,8 +252,8 @@ views::View* MediaGalleriesDialogViews::CreateExtraView() {
   DCHECK(!auxiliary_button_);
   base::string16 button_label = controller_->GetAuxiliaryButtonText();
   if (!button_label.empty()) {
-    auxiliary_button_ = new views::LabelButton(this, button_label);
-    auxiliary_button_->SetStyle(views::Button::STYLE_BUTTON);
+    auxiliary_button_ =
+        views::MdTextButton::CreateSecondaryUiButton(this, button_label);
   }
   return auxiliary_button_;
 }