Implement addPath() method for Path object

Source/platform/graphics/Path.cpp

Index: Source/platform/graphics/Path.cpp
diff --git a/Source/platform/graphics/Path.cpp b/Source/platform/graphics/Path.cpp
index 633b64eee665bf117b6e682efc42db8e73fd5064..cac95274fb9d6aa2fa90f8c8f329158efa4db099 100644
--- a/Source/platform/graphics/Path.cpp
+++ b/Source/platform/graphics/Path.cpp
@@ -472,6 +472,11 @@ void Path::addBeziersForRoundedRect(const FloatRect& rect, const FloatSize& topL
     closeSubpath();
 }
 
+void Path::addPath(const Path& src, const AffineTransform& transform)
+{
+    m_path.addPath(src.skPath(), affineTransformToSkMatrix(transform));
+}
+
 void Path::translate(const FloatSize& size)
 {
     m_path.offset(WebCoreFloatToSkScalar(size.width()), WebCoreFloatToSkScalar(size.height()));