Change Painter factory functions to unique_ptr

ui/views/controls/button/label_button_border.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
 #define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 40 matching lines @@
   // Overridden from LabelButtonBorder:
   bool PaintsButtonState(bool focused, Button::ButtonState state) override;
 
   // Overridden from Border:
   void Paint(const View& view, gfx::Canvas* canvas) override;
   gfx::Size GetMinimumSize() const override;
 
   // Get or set the painter used for the specified |focused| button |state|.
   // LabelButtonAssetBorder takes and retains ownership of |painter|.
   Painter* GetPainter(bool focused, Button::ButtonState state);
-  void SetPainter(bool focused, Button::ButtonState state, Painter* painter);
+  void SetPainter(bool focused,
+                  Button::ButtonState state,
+                  std::unique_ptr<Painter> painter);
 
  private:
   // The painters used for each unfocused or focused button state.
   std::unique_ptr<Painter> painters_[2][Button::STATE_COUNT];
 
   DISALLOW_COPY_AND_ASSIGN(LabelButtonAssetBorder);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_