ui/gfx: split out code that depends on paint

ui/views/controls/button/toggle_button.cc

 // Copyright 2016 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/toggle_button.h"
 
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/shadow_value.h"
+#include "ui/gfx/skia_paint_util.h"
 #include "ui/views/animation/ink_drop_impl.h"
 #include "ui/views/animation/ink_drop_ripple.h"
 #include "ui/views/border.h"
 #include "ui/views/painter.h"
 
 namespace views {
 
 namespace {
 
 // Constants are measured in dip.
@@ skipping 246 matching lines @@
     // TODO(varkha, estade): The thumb is using its own view. Investigate if
     // repainting in every animation step to update colors could be avoided.
     UpdateThumb();
     SchedulePaint();
     return;
   }
   CustomButton::AnimationProgressed(animation);
 }
 
 }  // namespace views