use Make instead of Create to return a shared shader

src/core/SkShader.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.
  */
 
 #include "SkAtomics.h"
 #include "SkBitmapProcShader.h"
 #include "SkColorShader.h"
@@ skipping 211 matching lines @@
 
 const GrFragmentProcessor* SkShader::asFragmentProcessor(GrContext*, const SkMatrix&,
                                                          const SkMatrix*, SkFilterQuality)  const {
     return nullptr;
 }
 
 SkShader* SkShader::refAsALocalMatrixShader(SkMatrix*) const {
     return nullptr;
 }
 
-SkShader* SkShader::CreateEmptyShader() { return new SkEmptyShader; }
+sk_sp<SkShader> SkShader::MakeEmptyShader() { return sk_sp<SkEmptyShader>(); }
 
-SkShader* SkShader::CreateColorShader(SkColor color) { return new SkColorShader(color); }
+sk_sp<SkShader> SkShader::MakeColorShader(SkColor color) { return sk_make_sp<SkColorShader>(color); }
 
-SkShader* SkShader::CreateBitmapShader(const SkBitmap& src, TileMode tmx, TileMode tmy,
-                                       const SkMatrix* localMatrix) {
-    return SkCreateBitmapShader(src, tmx, tmy, localMatrix, nullptr);
+sk_sp<SkShader> SkShader::MakeBitmapShader(const SkBitmap& src, TileMode tmx, TileMode tmy,
+                                           const SkMatrix* localMatrix) {
+    return SkMakeBitmapShader(src, tmx, tmy, localMatrix, nullptr);
 }
 
-SkShader* SkShader::CreatePictureShader(const SkPicture* src, TileMode tmx, TileMode tmy,
-                                        const SkMatrix* localMatrix, const SkRect* tile) {
-    return SkPictureShader::Create(src, tmx, tmy, localMatrix, tile);
+sk_sp<SkShader> SkShader::MakePictureShader(const SkPicture* src, TileMode tmx, TileMode tmy,
+                                            const SkMatrix* localMatrix, const SkRect* tile) {
+    return SkPictureShader::Make(src, tmx, tmy, localMatrix, tile);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkShader::toString(SkString* str) const {
     if (!fLocalMatrix.isIdentity()) {
         str->append(" ");
         fLocalMatrix.toString(str);
     }
 }
 #endif
@@ skipping 101 matching lines @@
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkFlattenable* SkEmptyShader::CreateProc(SkReadBuffer&) {
-    return SkShader::CreateEmptyShader();
+    return SkShader::MakeEmptyShader().release();
 }
 
 #ifndef SK_IGNORE_TO_STRING
 #include "SkEmptyShader.h"
 
 void SkEmptyShader::toString(SkString* str) const {
     str->append("SkEmptyShader: (");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif