views: remove PlatformStyle::CreateLabelButtonBorder

ui/views/style/mac/dialog_button_border_mac.cc

-// Copyright 2015 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/style/mac/dialog_button_border_mac.h"
-
-#include "base/logging.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkDrawLooper.h"
-#include "third_party/skia/include/core/SkPaint.h"
-#include "third_party/skia/include/core/SkPath.h"
-#include "third_party/skia/include/effects/SkGradientShader.h"
-#include "ui/gfx/canvas.h"
-#include "ui/native_theme/native_theme_mac.h"
-#include "ui/views/border.h"
-#include "ui/views/controls/button/custom_button.h"
-#include "ui/views/controls/button/label_button.h"
-
-using ui::NativeThemeMac;
-
-namespace views {
-namespace {
-
-// Default border insets, to provide text padding.
-const int kPaddingX = 19;
-const int kPaddingY = 7;
-
-NativeThemeMac::ButtonBackgroundType PaintTypeFromButton(
-    const LabelButton& button) {
-  if (!button.enabled() || button.state() == Button::STATE_DISABLED)
-    return NativeThemeMac::ButtonBackgroundType::DISABLED;
-  if (button.state() == Button::STATE_PRESSED)
-    return NativeThemeMac::ButtonBackgroundType::PRESSED;
-  if (DialogButtonBorderMac::ShouldRenderDefault(button))
-    return NativeThemeMac::ButtonBackgroundType::HIGHLIGHTED;
-  return NativeThemeMac::ButtonBackgroundType::NORMAL;
-}
-
-}  // namespace
-
-DialogButtonBorderMac::DialogButtonBorderMac() {
-  set_insets(gfx::Insets(kPaddingY, kPaddingX, kPaddingY, kPaddingX));
-}
-
-DialogButtonBorderMac::~DialogButtonBorderMac() {}
-
-// static
-bool DialogButtonBorderMac::ShouldRenderDefault(const LabelButton& button) {
-  // TODO(tapted): Check whether the Widget is active, and only return true here
-  // if it is. Plumbing this requires default buttons to also observe Widget
-  // activations to ensure text and background colors are properly invalidated.
-  return button.is_default();
-}
-
-void DialogButtonBorderMac::Paint(const View& view, gfx::Canvas* canvas) {
-  // Actually, |view| should be a LabelButton as well, but don't rely too much
-  // on RTTI.
-  DCHECK(CustomButton::AsCustomButton(&view));
-  const LabelButton& button = static_cast<const LabelButton&>(view);
-
-  ui::NativeThemeMac::PaintStyledGradientButton(
-      canvas->sk_canvas(), view.GetLocalBounds(), PaintTypeFromButton(button),
-      true, true, button.HasFocus());
-}
-
-gfx::Size DialogButtonBorderMac::GetMinimumSize() const {
-  // Overridden by PlatformStyle. Here, just ensure the minimum size is
-  // consistent with the padding.
-  return gfx::Size(2 * kPaddingX, 2 * kPaddingY);
-}
-
-}  // namespace views