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

chrome/browser/ui/omnibox/location_bar_util.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 "chrome/browser/ui/omnibox/location_bar_util.h"
 
 #include "base/i18n/rtl.h"
 #include "base/string_util.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "third_party/skia/include/core/SkPaint.h"
@@ skipping 32 matching lines @@
     return;
 
   SkPoint gradient_bounds[2] = { {SkIntToScalar(bounds.x()),
                                   SkIntToScalar(bounds.y())},
                                  {SkIntToScalar(bounds.x()),
                                   SkIntToScalar(bounds.bottom())} };
   SkColor gradient_colors[2] = {
     color_utils::AlphaBlend(text_color, background_color, 0x13),
     color_utils::AlphaBlend(text_color, background_color, 0x1d)
   };
-  SkShader* gradient = SkGradientShader::CreateLinear(
+  skia::RefPtr<SkShader> gradient = SkGradientShader::CreateLinear(
       gradient_bounds, gradient_colors, NULL, 2, SkShader::kClamp_TileMode);
   SkPaint paint;
-  paint.setShader(gradient);
-  gradient->unref();
+  paint.setShader(gradient.get());
   canvas->DrawRect(bounds, paint);
 
   SkColor border_color =
       color_utils::AlphaBlend(text_color, background_color, 0x55);
   canvas->DrawLine(bounds.origin(),
                    gfx::Point(bounds.x(), bounds.bottom()),
                    border_color);
   // "-1" because gfx::Rects are half-open, not including their right or
   // bottom edges.
   canvas->DrawLine(gfx::Point(bounds.right() - 1, bounds.y()),
                    gfx::Point(bounds.right() - 1, bounds.bottom()),
                    border_color);
 }
 
 }  // namespace location_bar_util