use factory for colorshader, class is deprecated

Source/platform/graphics/Gradient.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "platform/graphics/Gradient.h"
 
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/skia/SkiaUtils.h"
 #include "third_party/skia/include/core/SkColor.h"
-#include "third_party/skia/include/core/SkColorShader.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 
 typedef Vector<SkScalar, 8> ColorStopOffsetVector;
 typedef Vector<SkColor, 8> ColorStopColorVector;
 
 namespace blink {
 
 Gradient::Gradient(const FloatPoint& p0, const FloatPoint& p1)
     : m_p0(p0)
@@ skipping 207 matching lines @@
             m_gradient = adoptRef(SkGradientShader::CreateTwoPointConical(m_p0.data(), radius0, m_p1.data(), radius1, colors.data(), pos.data(), static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, &localMatrix));
         }
     } else {
         SkPoint pts[2] = { m_p0.data(), m_p1.data() };
         SkMatrix localMatrix = affineTransformToSkMatrix(m_gradientSpaceTransformation);
         m_gradient = adoptRef(SkGradientShader::CreateLinear(pts, colors.data(), pos.data(), static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, &localMatrix));
     }
 
     if (!m_gradient) {
         // use last color, since our "geometry" was degenerate (e.g. radius==0)
-        m_gradient = adoptRef(new SkColorShader(colors[countUsed - 1]));
+        m_gradient = adoptRef(SkShader::CreateColorShader(colors[countUsed - 1]));
     }
     return m_gradient.get();
 }
 
 } // namespace blink