views: use darker stroke for non-prominent buttons

ui/native_theme/common_theme.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/native_theme/common_theme.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/base/material_design/material_design_controller.h"
@@ skipping 143 matching lines @@
     case NativeTheme::kColorId_BlueButtonShadowColor:
       return kBlueButtonShadowColor;
     case NativeTheme::kColorId_ProminentButtonColor:
       return kProminentButtonColor;
     case NativeTheme::kColorId_TextOnProminentButtonColor:
       return kProminentButtonTextColor;
     case NativeTheme::kColorId_ButtonPressedShade:
       return SK_ColorTRANSPARENT;
     case NativeTheme::kColorId_ButtonDisabledColor:
       return kDisabledMenuItemForegroundColor;
+    case NativeTheme::kColorId_ProminentButtonBorderColor:
+      return SK_ColorTRANSPARENT;
+    case NativeTheme::kColorId_NonProminentButtonBorderColor:
+      return SkColorSetA(SK_ColorBLACK, 0x33);
 
     // MenuItem
     case NativeTheme::kColorId_SelectedMenuItemForegroundColor:
       return kSelectedMenuItemForegroundColor;
     case NativeTheme::kColorId_MenuBorderColor:
       return kMenuBorderColor;
     case NativeTheme::kColorId_EnabledMenuButtonBorderColor:
       return kEnabledMenuButtonBorderColor;
     case NativeTheme::kColorId_FocusedMenuButtonBorderColor:
     case NativeTheme::kColorId_HoverMenuButtonBorderColor:
@@ skipping 162 matching lines @@
   }
   if (menu_item.corner_radius > 0) {
     const SkScalar radius = SkIntToScalar(menu_item.corner_radius);
     canvas->drawRoundRect(gfx::RectToSkRect(rect), radius, radius, paint);
     return;
   }
   canvas->drawRect(gfx::RectToSkRect(rect), paint);
 }
 
 }  // namespace ui