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

chrome/browser/ui/views/theme_helpers.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/views/theme_helpers.h"
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atltheme.h>
 
@@ skipping 31 matching lines @@
     SkColor grad_colors[2];
     COLORREF hl_ref = ::GetSysColor(COLOR_3DHILIGHT);
     grad_colors[0] = SkColorSetRGB(GetRValue(hl_ref), GetGValue(hl_ref),
                                    GetBValue(hl_ref));
     COLORREF face_ref = ::GetSysColor(COLOR_3DFACE);
     grad_colors[1] = SkColorSetRGB(GetRValue(face_ref), GetGValue(face_ref),
                                    GetBValue(face_ref));
     SkPoint grad_points[2];
     grad_points[0].set(SkIntToScalar(0), SkIntToScalar(0));
     grad_points[1].set(SkIntToScalar(width), SkIntToScalar(0));
-    SkShader* gradient_shader = SkGradientShader::CreateLinear(
+    skia::RefPtr<SkShader> gradient_shader = SkGradientShader::CreateLinear(
         grad_points, grad_colors, NULL, 2, SkShader::kRepeat_TileMode);
     SkPaint paint;
-    paint.setShader(gradient_shader);
+    paint.setShader(gradient_shader.get());
     // Shader created with a ref count of 1, release as the paint now owns
     // the gradient.
-    gradient_shader->unref();
     paint.setStyle(SkPaint::kFill_Style);
     canvas.sk_canvas()->drawRectCoords(
         SkIntToScalar(0), SkIntToScalar(0),
         SkIntToScalar(width), SkIntToScalar(1), paint);
   }
 
   // Extract the color values from the selected pixels
   // The | in the following operations forces the alpha to 0xFF. This is
   // needed as windows sets the alpha to 0 when it renders.
   SkDevice* device = skia::GetTopDevice(*canvas.sk_canvas());
@@ skipping 16 matching lines @@
   if (!theme.IsThemeNull()) {
     *dark_color = SkColorSetARGB(60, 0, 0, 0);
   } else {
     COLORREF shadow_ref = ::GetSysColor(COLOR_3DSHADOW);
     *dark_color = SkColorSetARGB(175,
                                  GetRValue(shadow_ref),
                                  GetGValue(shadow_ref),
                                  GetBValue(shadow_ref));
   }
 }