Views: factor out Combobox background and const-ify style

chrome/browser/ui/views/translate/translate_bubble_view.cc

Index: chrome/browser/ui/views/translate/translate_bubble_view.cc
diff --git a/chrome/browser/ui/views/translate/translate_bubble_view.cc b/chrome/browser/ui/views/translate/translate_bubble_view.cc
index 92df6f292921787449849151e346431ac06d6583..0e1f12a140b28ba3463777ebcffcc697e1a0310c 100644
--- a/chrome/browser/ui/views/translate/translate_bubble_view.cc
+++ b/chrome/browser/ui/views/translate/translate_bubble_view.cc
@@ -642,10 +642,10 @@ views::View* TranslateBubbleView::CreateViewBeforeTranslate() {
     items[static_cast<size_t>(DenialComboboxIndex::NEVER_TRANSLATE_SITE)] =
         l10n_util::GetStringUTF16(IDS_TRANSLATE_BUBBLE_NEVER_TRANSLATE_SITE);
     denial_combobox_model_.reset(new ui::SimpleComboboxModel(items));
-    denial_combobox_ = new views::Combobox(denial_combobox_model_.get());
+    denial_combobox_ = new views::Combobox(denial_combobox_model_.get(),
+                                           views::Combobox::STYLE_ACTION);
     denial_combobox_->set_id(COMBOBOX_ID_DENIAL);
     denial_combobox_->set_listener(this);
-    denial_combobox_->SetStyle(views::Combobox::STYLE_ACTION);
     layout->AddView(denial_combobox_);
   }