Remove DialogDelegate::UseNewStyle and unused code.

ui/views/controls/button/label_button.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 "ui/views/controls/button/label_button.h"
 
 #include "base/logging.h"
 #include "grit/ui_resources.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/animation/throb_animation.h"
@@ skipping 122 matching lines @@
   if (style_ == STYLE_BUTTON) {
     int style = label_->font().GetStyle();
     style = is_default ? style | gfx::Font::BOLD : style & ~gfx::Font::BOLD;
     label_->SetFont(label_->font().DeriveFont(0, style));
   }
 }
 
 void LabelButton::SetStyle(ButtonStyle style) {
   // Use the new button style instead of the native button style.
   // TODO(msw): Officialy deprecate and remove STYLE_NATIVE_TEXTBUTTON.
-  if (DialogDelegate::UseNewStyle() && style == STYLE_NATIVE_TEXTBUTTON)
+  if (style == STYLE_NATIVE_TEXTBUTTON)
     style = STYLE_BUTTON;
 
   style_ = style;
   set_border(new LabelButtonBorder(style));
   // Inset the button focus rect from the actual border; roughly match Windows.
   set_focus_border(style == STYLE_BUTTON ?
       NULL : FocusBorder::CreateDashedFocusBorder(3, 3, 3, 3));
   if (style == STYLE_BUTTON || style == STYLE_NATIVE_TEXTBUTTON) {
     label_->SetHorizontalAlignment(gfx::ALIGN_CENTER);
     set_focusable(true);
@@ skipping 212 matching lines @@
   return ui::NativeTheme::kNormal;
 }
 
 ui::NativeTheme::State LabelButton::GetForegroundThemeState(
     ui::NativeTheme::ExtraParams* params) const {
   GetExtraParams(params);
   return ui::NativeTheme::kHovered;
 }
 
 }  // namespace views