Add support for blue buttons.

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/gfx/font.h"
 #include "ui/views/background.h"
@@ skipping 67 matching lines @@
   text->SetFont(*text_font_);
   text->SetMultiLine(true);
   text->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   layout->StartRowWithPadding(0, kNormalSetId, 0,
                               kHeadingPadding - title_descender);
   layout->AddView(text);
 
   views::LabelButton* signin_button = new views::LabelButton(
       this,
       delegate_->GetSigninButtonText());
-  signin_button->SetStyle(views::Button::STYLE_NATIVE_TEXTBUTTON);
+  signin_button->SetStyle(views::Button::STYLE_BLUE_BUTTON);
+  signin_button->SetFont(*button_font_);
   layout->StartRowWithPadding(0, kButtonSetId, 0,
                               kButtonPadding - text_descender);
   layout->AddView(signin_button);
 
   layout->StartRow(1, kNormalSetId);
   learn_more_link_ = new views::Link(delegate_->GetLearnMoreLinkText());
   learn_more_link_->set_listener(this);
   learn_more_link_->SetFont(*text_font_);
   learn_more_link_->SetUnderline(false);
   layout->AddView(learn_more_link_,
@@ skipping 27 matching lines @@
     if (source == learn_more_link_)
       delegate_->OpenLearnMore();
     else if (source == settings_link_)
       delegate_->OpenSettings();
     else
       NOTREACHED();
   }
 }
 
 }  // namespace app_list