Add skia::RefPtr class to wrap ref counted classes from Skia.

ash/wm/gestures/long_press_affordance_handler.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/wm/gestures/long_press_affordance_handler.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/shell.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell_window_ids.h"
@@ skipping 87 matching lines @@
                          gfx::Point& center,
                          int start_radius,
                          int end_radius,
                          SkColor* colors,
                          SkScalar* pos,
                          int num_colors) {
   SkPoint sk_center;
   int radius = (end_radius + start_radius) / 2;
   int glow_width = end_radius - start_radius;
   sk_center.iset(center.x(), center.y());
-  SkShader* shader = SkGradientShader::CreateTwoPointRadial(
+  skia::RefPtr<SkShader> shader = SkGradientShader::CreateTwoPointRadial(
       sk_center,
       SkIntToScalar(start_radius),
       sk_center,
       SkIntToScalar(end_radius),
       colors,
       pos,
       num_colors,
       SkShader::kClamp_TileMode);
   DCHECK(shader);
   SkPaint paint;
   paint.setStyle(SkPaint::kStroke_Style);
   paint.setStrokeWidth(glow_width);
-  paint.setShader(shader);
+  paint.setShader(shader.get());
   paint.setAntiAlias(true);
-  shader->unref();
   SkPath arc_path;
   arc_path.addArc(SkRect::MakeXYWH(center.x() - radius,
                                    center.y() - radius,
                                    2 * radius,
                                    2 * radius),
                   0, 360);
   canvas->DrawPath(arc_path, paint);
 }
 
 }  // namespace
@@ skipping 235 matching lines @@
     default:
       view_.reset();
       tap_down_touch_id_ = -1;
       tap_down_display_id_ = 0;
       break;
   }
 }
 
 }  // namespace internal
 }  // namespace ash