[MD User Menu] Adjusted its background color

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"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/macros.h"
 #import "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "third_party/skia/include/core/SkRRect.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
+#include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/shadow_value.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/native_theme/common_theme.h"
 
 namespace {
 
 // Values calculated by reading pixels and solving simultaneous equations
 // derived from "A over B" alpha compositing. Steps: Sample the semi-transparent
@@ skipping 78 matching lines @@
   return &s_native_theme;
 }
 
 SkColor NativeThemeMac::GetSystemColor(ColorId color_id) const {
   // TODO(tapted): Add caching for these, and listen for
   // NSSystemColorsDidChangeNotification.
   switch (color_id) {
     case kColorId_WindowBackground:
       return NSSystemColorToSkColor([NSColor windowBackgroundColor]);
     case kColorId_DialogBackground:
-      return kDialogBackgroundColor;
+      return ui::MaterialDesignController::IsSecondaryUiMaterial()
+                ? GetAuraColor(color_id, this)
+                : kDialogBackgroundColor;
     case kColorId_BubbleBackground:
       return SK_ColorWHITE;
 
     case kColorId_FocusedBorderColor:
     case kColorId_FocusedMenuButtonBorderColor:
       return NSSystemColorToSkColor([NSColor keyboardFocusIndicatorColor]);
     case kColorId_UnfocusedBorderColor:
       return NSSystemColorToSkColor([NSColor controlColor]);
 
     // Buttons and labels.
@@ skipping 263 matching lines @@
   canvas->drawDRRect(outer_shape, shape, paint);
 }
 
 NativeThemeMac::NativeThemeMac() {
 }
 
 NativeThemeMac::~NativeThemeMac() {
 }
 
 }  // namespace ui