[SVG] Re-enable experimental PathOpsSVGClipping support

Source/platform/graphics/Path.cpp

 /*
  * Copyright (C) 2003, 2006 Apple Computer, Inc.  All rights reserved.
  *                     2006 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 43 matching lines @@
 Path::~Path()
 {
 }
 
 Path& Path::operator=(const Path& other)
 {
     m_path = SkPath(other.m_path);
     return *this;
 }
 
+Path& Path::operator=(const SkPath& other)
+{
+    m_path = other;
+    return *this;
+}
+
 bool Path::operator==(const Path& other) const
 {
     return m_path == other.m_path;
 }
 
 bool Path::contains(const FloatPoint& point, WindRule rule) const
 {
     return SkPathContainsPoint(m_path, point, static_cast<SkPath::FillType>(rule));
 }
 
@@ skipping 418 matching lines @@
 
 #if ENABLE(ASSERT)
 bool ellipseIsRenderable(float startAngle, float endAngle)
 {
     return (std::abs(endAngle - startAngle) < twoPiFloat)
         || WebCoreFloatNearlyEqual(std::abs(endAngle - startAngle), twoPiFloat);
 }
 #endif
 
 } // namespace blink