ui/gfx: split out code that depends on paint

ash/magnifier/partial_magnification_controller.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 "ash/magnifier/partial_magnification_controller.h"
 
 #include "ash/common/system/chromeos/palette/palette_utils.h"
 #include "ash/shell.h"
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/paint_recorder.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/gfx/shadow_value.h"
+#include "ui/gfx/skia_paint_util.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/coordinate_conversion.h"
 
 namespace ash {
 namespace {
 
 // Ratio of magnifier scale.
 const float kMagnificationScale = 2.f;
 // Radius of the magnifying glass in DIP. This does not include the thickness
 // of the magnifying glass shadow and border.
@@ skipping 344 matching lines @@
 
 void PartialMagnificationController::RemoveZoomWidgetObservers() {
   DCHECK(host_widget_);
   host_widget_->RemoveObserver(this);
   aura::Window* root_window = host_widget_->GetNativeView()->GetRootWindow();
   DCHECK(root_window);
   root_window->RemoveObserver(this);
 }
 
 }  // namespace ash