Change Painter factory functions to unique_ptr

ui/views/background.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_BACKGROUND_H_
 #define UI_VIEWS_BACKGROUND_H_
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/views_export.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif  // defined(OS_WIN)
 
 namespace gfx {
@@ skipping 33 matching lines @@
   // Creates a background that fills the canvas in the specified color.
   static Background* CreateSolidBackground(int r, int g, int b, int a) {
     return CreateSolidBackground(SkColorSetARGB(a, r, g, b));
   }
 
   // Creates a background that contains a vertical gradient that varies
   // from |color1| to |color2|
   static Background* CreateVerticalGradientBackground(SkColor color1,
                                                       SkColor color2);
 
-  // Creates a background that contains a vertical gradient. The gradient can
-  // have multiple |colors|. The |pos| array contains the relative positions of
-  // each corresponding color. |colors| and |pos| must be the same size. The
-  // first element in |pos| must be 0.0 and the last element must be 1.0.
-  // |count| contains the number of elements in |colors| and |pos|.
-  static Background* CreateVerticalMultiColorGradientBackground(SkColor* colors,
-                                                                SkScalar* pos,
-                                                                size_t count);
-
   // Creates Chrome's standard panel background
   static Background* CreateStandardPanelBackground();
 
-  // Creates a Background from the specified Painter. If owns_painter is
-  // true, the Painter is deleted when the Border is deleted.
-  static Background* CreateBackgroundPainter(bool owns_painter,
-                                             Painter* painter);
+  // Creates a Background from the specified Painter.
+  static Background* CreateBackgroundPainter(std::unique_ptr<Painter> painter);
 
   // Render the background for the provided view
   virtual void Paint(gfx::Canvas* canvas, View* view) const = 0;
 
   // Set a solid, opaque color to be used when drawing backgrounds of native
   // controls.  Unfortunately alpha=0 is not an option.
   void SetNativeControlColor(SkColor color);
 
   // Returns the "background color".  This is equivalent to the color set in
   // SetNativeControlColor().  For solid backgrounds, this is the color; for
   // gradient backgrounds, it's the midpoint of the gradient; for painter
   // backgrounds, this is not useful (returns a default color).
   SkColor get_color() const { return color_; }
 
  private:
   SkColor color_;
 
   DISALLOW_COPY_AND_ASSIGN(Background);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BACKGROUND_H_