Avoid unneeded ref churn in SkDraw::drawVertices

src/core/SkDraw.cpp

Index: src/core/SkDraw.cpp
diff --git a/src/core/SkDraw.cpp b/src/core/SkDraw.cpp
index 70eb5732e13e7361b815b7494fce08c60c04433c..c35247bd99fc68925deaff6a73ec76a79a5b55b0 100644
--- a/src/core/SkDraw.cpp
+++ b/src/core/SkDraw.cpp
@@ -1894,7 +1894,6 @@ void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
     }
 
     // setup the custom shader (if needed)
-    sk_sp<SkShader> composeShader;
     if (colors) {
         if (nullptr == textures) {
             // just colors (no texture)
@@ -1908,8 +1907,7 @@ void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
                 xmode = SkXfermode::Create(SkXfermode::kModulate_Mode);
                 releaseMode = true;
             }
-            composeShader = sk_make_sp<SkComposeShader>(triShader, sk_ref_sp(shader), xmode);
-            p.setShader(composeShader);
+            p.setShader(sk_make_sp<SkComposeShader>(triShader, sk_ref_sp(shader), xmode));
             if (releaseMode) {
                 xmode->unref();
             }