Move Windows DC-initialization to skia_utils_win.h

ui/views/background.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/views/background.h"
 
 #include "base/logging.h"
-#include "skia/ext/skia_utils_win.h"
-#include "third_party/skia/include/core/SkPaint.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/views/painter.h"
 #include "ui/views/view.h"
 
+#if defined(OS_WIN)
+#include "skia/ext/skia_utils_win.h"
+#endif
+
 namespace views {
 
 // SolidBackground is a trivial Background implementation that fills the
 // background in a solid color.
 class SolidBackground : public Background {
  public:
   explicit SolidBackground(SkColor color) {
     SetNativeControlColor(color);
   }
 
@@ skipping 95 matching lines @@
   return background;
 }
 
 // static
 Background* Background::CreateBackgroundPainter(bool owns_painter,
                                                 Painter* painter) {
   return new BackgroundPainter(owns_painter, painter);
 }
 
 }  // namespace views