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

cc/software_renderer.cc

 // Copyright 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 "cc/software_renderer.h"
 
 #include <public/WebCompositorSoftwareOutputDevice.h>
 #include <public/WebImage.h>
 #include <public/WebSize.h>
 
@@ skipping 295 matching lines @@
 
     SkMatrix contentMat;
     contentMat.setRectToRect(contentRect, destRect, SkMatrix::kFill_ScaleToFit);
 
     SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(*content,
                                                                SkShader::kClamp_TileMode,
                                                                SkShader::kClamp_TileMode));
     shader->setLocalMatrix(contentMat);
     m_skCurrentPaint.setShader(shader);
 
-    SkImageFilter* filter = renderPass->filter;
+    SkImageFilter* filter = renderPass->filter.get();
     if (filter)
         m_skCurrentPaint.setImageFilter(filter);
 
     if (quad->mask_resource_id) {
         ResourceProvider::ScopedReadLockSoftware maskLock(m_resourceProvider, quad->mask_resource_id);
 
         const SkBitmap* mask = maskLock.skBitmap();
 
         SkRect maskRect = SkRect::MakeXYWH(
             quad->mask_tex_coord_offset_x * mask->width(),
@@ skipping 49 matching lines @@
 }
 
 void SoftwareRenderer::setVisible(bool visible)
 {
     if (m_visible == visible)
         return;
     m_visible = visible;
 }
 
 }  // namespace cc