cc: Move SkShader construction to a single spot in PaintShader

ui/views/color_chooser/color_chooser_view.cc

Index: ui/views/color_chooser/color_chooser_view.cc
diff --git a/ui/views/color_chooser/color_chooser_view.cc b/ui/views/color_chooser/color_chooser_view.cc
index 4daa497ad9bcab6fb2c8429436c5b348fbc67904..49ab0d282ff253cdeb0e8a314116a25eeb8a806f 100644
--- a/ui/views/color_chooser/color_chooser_view.cc
+++ b/ui/views/color_chooser/color_chooser_view.cc
@@ -104,8 +104,8 @@ void DrawGradientRect(const gfx::Rect& rect, SkColor start_color,
   else
     points[1].iset(0, rect.height() + 1);
   cc::PaintFlags flags;
-  flags.setShader(cc::WrapSkShader(SkGradientShader::MakeLinear(
-      points, colors, NULL, 2, SkShader::kClamp_TileMode)));
+  flags.setShader(base::MakeUnique<cc::PaintShader>(points, colors, nullptr, 2,
+                                                    SkShader::kClamp_TileMode));
   canvas->DrawRect(rect, flags);
 }