views: Fix border around menu button in content settings bubble.

chrome/browser/ui/views/content_setting_bubble_contents.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/views/content_setting_bubble_contents.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 288 matching lines @@
         layout->AddPaddingRow(0, views::kRelatedControlVerticalSpacing);
       layout->StartRow(0, kMediaMenuColumnSetId);
 
       views::Label* label =
           new views::Label(base::UTF8ToUTF16(i->second.label));
       label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 
       views::MenuButton* menu_button = new views::MenuButton(
           NULL, base::UTF8ToUTF16((i->second.selected_device.name)),
           this, true);
+      menu_button->SetStyle(views::Button::STYLE_BUTTON);
       menu_button->SetHorizontalAlignment(gfx::ALIGN_LEFT);
       menu_button->set_animate_on_state_change(false);
 
       MediaMenuParts* menu_view = new MediaMenuParts(i->first);
       menu_view->menu_model.reset(new ContentSettingMediaMenuModel(
           i->first,
           content_setting_bubble_model_.get(),
           base::Bind(&ContentSettingBubbleContents::UpdateMenuLabel,
                      base::Unretained(this))));
       media_menus_[menu_button] = menu_view;
@@ skipping 169 matching lines @@
   int width = button->GetPreferredSize().width();
   for (int i = 0; i < menu_model->GetItemCount(); ++i) {
     button->SetText(menu_model->GetLabelAt(i));
     width = std::max(width, button->GetPreferredSize().width());
   }
 
   // Recover the title for the menu button.
   button->SetText(title);
   return width;
 }