ui: Use skia::RefPtr<T> for implicit safe reference counting.

ui/views/controls/progress_bar.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 "ui/views/controls/progress_bar.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/logging.h"
@@ skipping 52 matching lines @@
   paint.setStyle(SkPaint::kFill_Style);
   paint.setFlags(SkPaint::kAntiAlias_Flag);
 
   SkPoint p[2];
   p[0].iset(x, y);
   if (gradient_horizontal) {
     p[1].iset(x + w, y);
   } else {
     p[1].iset(x, y + h);
   }
-  SkShader* s = SkGradientShader::CreateLinear(
-      p, colors, points, count, SkShader::kClamp_TileMode, NULL);
-  paint.setShader(s);
-  // Need to unref shader, otherwise never deleted.
-  s->unref();
+  skia::RefPtr<SkShader> s = skia::AdoptRef(SkGradientShader::CreateLinear(
+      p, colors, points, count, SkShader::kClamp_TileMode, NULL));
+  paint.setShader(s.get());
 
   canvas->DrawPath(path, paint);
 }
 
 void FillRoundRect(gfx::Canvas* canvas,
                    int x, int y,
                    int w, int h,
                    int corner_radius,
                    SkColor gradient_start_color,
                    SkColor gradient_end_color,
@@ skipping 194 matching lines @@
   if (progress_width > 1) {
     FillRoundRect(canvas, 0, 0, progress_width, height(), kCornerRadius,
                   kBarColorStart, kBarColorEnd, false);
   }
   StrokeRoundRect(canvas, 0, 0, width(), height(), kCornerRadius,
                   kBorderColor, kBorderWidth);
 #endif
 }
 
 }  // namespace views