switch xfermodes over to sk_sp

src/core/SkXfermode.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 "SkXfermode.h"
 #include "SkXfermode_proccoeff.h"
 #include "SkColorPriv.h"
@@ skipping 1079 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////
 
 SkFlattenable* SkProcCoeffXfermode::CreateProc(SkReadBuffer& buffer) {
     uint32_t mode32 = buffer.read32();
     if (!buffer.validate(mode32 < SK_ARRAY_COUNT(gProcCoeffs))) {
         return nullptr;
     }
-    return SkXfermode::Create((SkXfermode::Mode)mode32);
+    return SkXfermode::Make((SkXfermode::Mode)mode32).release();
 }
 
 void SkProcCoeffXfermode::flatten(SkWriteBuffer& buffer) const {
     buffer.write32(fMode);
 }
 
 bool SkProcCoeffXfermode::asMode(Mode* mode) const {
     if (mode) {
         *mode = fMode;
     }
@@ skipping 187 matching lines @@
         str->append("can't use");
     } else {
         str->append(gCoeffStrings[fDstCoeff]);
     }
 }
 #endif
 
 
 SK_DECLARE_STATIC_ONCE_PTR(SkXfermode, cached[SkXfermode::kLastMode + 1]);
 
-SkXfermode* SkXfermode::Create(Mode mode) {
+sk_sp<SkXfermode> SkXfermode::Make(Mode mode) {
     SkASSERT(SK_ARRAY_COUNT(gProcCoeffs) == kModeCount);
 
     if ((unsigned)mode >= kModeCount) {
         // report error
         return nullptr;
     }
 
     // Skia's "default" mode is srcover. nullptr in SkPaint is interpreted as srcover
     // so we can just return nullptr from the factory.
     if (kSrcOver_Mode == mode) {
         return nullptr;
     }
 
-    return SkSafeRef(cached[mode].get([=]{
+    return sk_ref_sp(cached[mode].get([=]{
         ProcCoeff rec = gProcCoeffs[mode];
         if (auto xfermode = SkOpts::create_xfermode(rec, mode)) {
             return xfermode;
         }
         return (SkXfermode*) new SkProcCoeffXfermode(rec, mode);
     }));
 }
 
 SkXfermodeProc SkXfermode::GetProc(Mode mode) {
     SkXfermodeProc  proc = nullptr;
@@ skipping 77 matching lines @@
     if (!xfer) {
         return SkXfermode::kOpaque_SrcColorOpacity == opacityType;
     }
 
     return xfer->isOpaque(opacityType);
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END