views: refactor away PlatformStyle::BackgroundColorForMdButton

ui/native_theme/native_theme_dark_aura.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/native_theme/native_theme_dark_aura.h"
 
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/color_palette.h"
 
 namespace ui {
@@ skipping 73 matching lines @@
     // Alert icons
     case kColorId_AlertSeverityLow:
       return gfx::kGoogleGreen300;
     case kColorId_AlertSeverityMedium:
       return gfx::kGoogleYellow300;
     case kColorId_AlertSeverityHigh:
       return gfx::kGoogleRed300;
 
     // Intentional pass-throughs to NativeThemeAura.
     case kColorId_TextOnCallToActionColor:
+    case kColorId_ButtonPressedShade:
     case kColorId_ResultsTableHoveredBackground:
     case kColorId_ResultsTableSelectedBackground:
     case kColorId_ResultsTableNormalUrl:
     case kColorId_ResultsTableHoveredUrl:
     case kColorId_ResultsTableSelectedUrl:
       return NativeThemeAura::GetSystemColor(color_id);
 
     // Any other color is not defined and shouldn't be used in a dark theme.
     case kColorId_WindowBackground:
     case kColorId_DialogBackground:
@@ skipping 55 matching lines @@
 
   NOTREACHED();
   return gfx::kPlaceholderColor;
 }
 
 NativeThemeDarkAura::NativeThemeDarkAura() {}
 
 NativeThemeDarkAura::~NativeThemeDarkAura() {}
 
 }  // namespace ui