Avoid unneeded ref churn in SkDraw::drawVertices

src/core/SkDraw.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #define __STDC_LIMIT_MACROS
 
 #include "SkDraw.h"
 #include "SkBlitter.h"
@@ skipping 1876 matching lines @@
     if (nullptr == shader) {
         // if we have no shader, we ignore the texture coordinates
         textures = nullptr;
     } else if (nullptr == textures) {
         // if we don't have texture coordinates, ignore the shader
         p.setShader(nullptr);
         shader = nullptr;
     }
 
     // setup the custom shader (if needed)
-    sk_sp<SkShader> composeShader;
     if (colors) {
         if (nullptr == textures) {
             // just colors (no texture)
             p.setShader(triShader);
             shader = p.getShader();
         } else {
             // colors * texture
             SkASSERT(shader);
             bool releaseMode = false;
             if (nullptr == xmode) {
                 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();
             }
         }
     }
 
     SkAutoBlitterChoose blitter(fDst, *fMatrix, p);
     // Abort early if we failed to create a shader context.
     if (blitter->isNullBlitter()) {
         return;
@@ skipping 150 matching lines @@
         mask->fImage = SkMask::AllocImage(size);
         memset(mask->fImage, 0, mask->computeImageSize());
     }
 
     if (SkMask::kJustComputeBounds_CreateMode != mode) {
         draw_into_mask(*mask, devPath, style);
     }
 
     return true;
 }