Add views::Button style enum for LabelButton [native] styling, etc.

ui/app_list/views/signin_view.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/app_list/views/signin_view.h"
 
 #include "ui/app_list/signin_delegate.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/label_button.h"
@@ skipping 44 matching lines @@
   views::Label* text = new views::Label(delegate_->GetSigninText());
   text->SetFont(rb.GetFont(ui::ResourceBundle::SmallFont));
   text->SetMultiLine(true);
   text->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   layout->StartRowWithPadding(0, kTopSetId, 0, kHeadingPadding);
   layout->AddView(text);
 
   views::LabelButton* signin_button = new views::LabelButton(
       this,
       delegate_->GetSigninButtonText());
-  signin_button->SetNativeTheme(true);
+  signin_button->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
   layout->StartRowWithPadding(0, kTopSetId, 0, kButtonPadding);
   layout->AddView(signin_button);
 
   const int kBottomSetId = 1;
   columns = layout->AddColumnSet(kBottomSetId);
   columns->AddColumn(views::GridLayout::FILL,
                      views::GridLayout::FILL,
                      0,
                      views::GridLayout::USE_PREF,
                      0,
@@ skipping 37 matching lines @@
     if (source == learn_more_link_)
       delegate_->OpenLearnMore();
     else if (source == settings_link_)
       delegate_->OpenSettings();
     else
       NOTREACHED();
   }
 }
 
 }  // namespace app_list