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

ui/views/controls/button/blue_button.cc

 // Copyright 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/views/controls/button/blue_button.h"
 
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/vector2d.h"
-#include "ui/gfx/sys_color_change_listener.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/views/controls/button/label_button_border.h"
 #include "ui/views/resources/grit/views_resources.h"
 
 namespace views {
 
 // static
 const char BlueButton::kViewClassName[] = "views/BlueButton";
 
 BlueButton::BlueButton(ButtonListener* listener, const base::string16& text)
     : LabelButton(listener, text) {
   // Inherit STYLE_BUTTON insets, minimum size, alignment, etc.
   SetStyle(STYLE_BUTTON);
   UpdateThemedBorder();
 }
 
 BlueButton::~BlueButton() {}
 
 void BlueButton::ResetColorsFromNativeTheme() {
   LabelButton::ResetColorsFromNativeTheme();
-  if (!gfx::IsInvertedColorScheme()) {
+  if (!color_utils::IsInvertedColorScheme()) {
     SetTextColor(STATE_NORMAL, GetNativeTheme()->
         GetSystemColor(ui::NativeTheme::kColorId_BlueButtonEnabledColor));
     SetTextColor(STATE_HOVERED, GetNativeTheme()->
         GetSystemColor(ui::NativeTheme::kColorId_BlueButtonHoverColor));
     SetTextColor(STATE_PRESSED, GetNativeTheme()->
         GetSystemColor(ui::NativeTheme::kColorId_BlueButtonPressedColor));
     SetTextColor(STATE_DISABLED, GetNativeTheme()->
         GetSystemColor(ui::NativeTheme::kColorId_BlueButtonDisabledColor));
 
     label()->SetShadows(gfx::ShadowValues(
@@ skipping 26 matching lines @@
   button_border->SetPainter(true, STATE_HOVERED, Painter::CreateImagePainter(
       *rb.GetImageSkiaNamed(IDR_BLUE_BUTTON_FOCUSED_HOVER), insets));
   button_border->SetPainter(true, STATE_PRESSED, Painter::CreateImagePainter(
       *rb.GetImageSkiaNamed(IDR_BLUE_BUTTON_FOCUSED_PRESSED), insets));
   button_border->SetPainter(true, STATE_DISABLED, Painter::CreateImagePainter(
       *rb.GetImageSkiaNamed(IDR_BLUE_BUTTON_DISABLED), insets));
   return button_border.Pass();
 }
 
 }  // namespace views