[SVGDom] Initial linear gradient support

experimental/svg/model/SkSVGNode.cpp

Index: experimental/svg/model/SkSVGNode.cpp
diff --git a/experimental/svg/model/SkSVGNode.cpp b/experimental/svg/model/SkSVGNode.cpp
index 5a73ace548cfd71b1d2879bca7538a2e94616e6f..012c7d22779bff7db48bb26fe90c6c0d7a24dce6 100644
--- a/experimental/svg/model/SkSVGNode.cpp
+++ b/experimental/svg/model/SkSVGNode.cpp
@@ -24,6 +24,12 @@ void SkSVGNode::render(const SkSVGRenderContext& ctx) const {
     }
 }
 
+bool SkSVGNode::asPaint(const SkSVGRenderContext& ctx, SkPaint* paint) const {
+    SkSVGRenderContext localContext(ctx);
+
+    return this->onPrepareToRender(&localContext) && this->onAsPaint(localContext, paint);
+}
+
 bool SkSVGNode::onPrepareToRender(SkSVGRenderContext* ctx) const {
     ctx->applyPresentationAttributes(fPresentationAttributes);
     return true;