views: refactor away PlatformStyle::BackgroundColorForMdButton

ui/native_theme/native_theme_mac.mm

 // Copyright (c) 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/native_theme/native_theme_mac.h"
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
 #include "base/mac/mac_util.h"
@@ skipping 108 matching lines @@
 }
 
 // static
 SkColor NativeThemeMac::ApplySystemControlTint(SkColor color) {
   if ([NSColor currentControlTint] == NSGraphiteControlTint)
     return ColorToGrayscale(color);
   return color;
 }
 
 SkColor NativeThemeMac::GetSystemColor(ColorId color_id) const {
-  // Even with --secondary-ui-md, menus use the platform colors and styling.
+  // Even with --secondary-ui-md, menus use the platform colors and styling, and
+  // Mac has a couple of specific color overrides.
   switch (color_id) {
     case kColorId_EnabledMenuItemForegroundColor:
       return NSSystemColorToSkColor([NSColor controlTextColor]);
     case kColorId_DisabledMenuItemForegroundColor:
     case kColorId_DisabledEmphasizedMenuItemForegroundColor:
       return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
     case kColorId_SelectedMenuItemForegroundColor:
       return NSSystemColorToSkColor([NSColor selectedMenuItemTextColor]);
     case kColorId_FocusedMenuItemBackgroundColor:
     case kColorId_HoverMenuItemBackgroundColor:
       return NSSystemColorToSkColor([NSColor selectedMenuItemColor]);
     case kColorId_MenuBackgroundColor:
       return kMenuPopupBackgroundColor;
     case kColorId_MenuSeparatorColor:
       return base::mac::IsOS10_9() ? kMenuSeparatorColorMavericks
                                    : kMenuSeparatorColor;
     case kColorId_MenuBorderColor:
       return kMenuBorderColor;
+
+    case kColorId_ButtonPressedShade:
+      return SkColorSetA(SK_ColorBLACK, 0x08);
     default:
       break;
   }
 
   if (ui::MaterialDesignController::IsSecondaryUiMaterial())
     return ApplySystemControlTint(GetAuraColor(color_id, this));
 
   // TODO(tapted): Add caching for these, and listen for
   // NSSystemColorsDidChangeNotification.
   switch (color_id) {
@@ skipping 267 matching lines @@
   canvas->drawDRRect(outer_shape, shape, paint);
 }
 
 NativeThemeMac::NativeThemeMac() {
 }
 
 NativeThemeMac::~NativeThemeMac() {
 }
 
 }  // namespace ui