Make SysColorChangeListener Windows-only instead of having an empty shell.

ui/native_theme/native_theme_win.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/native_theme_win.h"
 
 #include <windows.h>
 #include <uxtheme.h>
 #include <vsstyle.h>
 #include <vssym32.h>
@@ skipping 464 matching lines @@
   const SkColor kPositiveTextColor = SkColorSetRGB(0x0b, 0x80, 0x43);
   const SkColor kNegativeTextColor = SkColorSetRGB(0xc5, 0x39, 0x29);
 
   switch (color_id) {
     // Windows
     case kColorId_WindowBackground:
       return system_colors_[COLOR_WINDOW];
 
     // Dialogs
     case kColorId_DialogBackground:
-      return gfx::IsInvertedColorScheme() ?
+      return color_utils::IsInvertedColorScheme() ?
           color_utils::InvertColor(kDialogBackgroundColor) :
           kDialogBackgroundColor;
 
     // FocusableBorder
     case kColorId_FocusedBorderColor:
       return kFocusedBorderColor;
     case kColorId_UnfocusedBorderColor:
       return kUnfocusedBorderColor;
 
     // Button
@@ skipping 1588 matching lines @@
     break;
   case LAST:
     NOTREACHED();
     break;
   }
   theme_handles_[theme_name] = handle;
   return handle;
 }
 
 }  // namespace ui