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

cc/heads_up_display_layer_impl.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/heads_up_display_layer_impl.h"
 
 #include <limits>
 
 #include "base/stringprintf.h"
 #include "cc/debug_colors.h"
@@ skipping 21 matching lines @@
     // swizzle our colors when drawing to the SkCanvas.
     SkColorMatrix swizzleMatrix;
     for (int i = 0; i < 20; ++i)
         swizzleMatrix.fMat[i] = 0;
     swizzleMatrix.fMat[0 + 5 * 2] = 1;
     swizzleMatrix.fMat[1 + 5 * 1] = 1;
     swizzleMatrix.fMat[2 + 5 * 0] = 1;
     swizzleMatrix.fMat[3 + 5 * 3] = 1;
 
     SkPaint paint;
-    paint.setColorFilter(new SkColorMatrixFilter(swizzleMatrix))->unref();
+    skia::RefPtr<SkColorMatrixFilter> filter = new SkColorMatrixFilter(swizzleMatrix);
+    paint.setColorFilter(filter.get());
 
     return paint;
 }
 
 HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(int id)
     : LayerImpl(id)
     , m_averageFPS(0)
     , m_minFPS(0)
     , m_maxFPS(0)
     , m_showFPSCounter(false)
@@ skipping 320 matching lines @@
         canvas->drawRect(skRect, paint);
     }
 }
 
 const char* HeadsUpDisplayLayerImpl::layerTypeAsString() const
 {
     return "HeadsUpDisplayLayer";
 }
 
 }  // namespace cc