change flattenable factory to return sk_sp

src/core/SkPaint.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 "SkPaint.h"
 #include "SkAutoKern.h"
 #include "SkChecksum.h"
@@ skipping 1912 matching lines @@
     if (flatFlags & kHasTypeface_FlatFlag) {
         this->setTypeface(buffer.readTypeface());
     } else {
         this->setTypeface(nullptr);
     }
 
     if (flatFlags & kHasEffects_FlatFlag) {
         this->setPathEffect(buffer.readPathEffect());
         this->setShader(buffer.readShader());
         this->setXfermode(buffer.readXfermode());
-        SkSafeUnref(this->setMaskFilter(buffer.readMaskFilter()));
+        this->setMaskFilter(buffer.readMaskFilter());
         this->setColorFilter(buffer.readColorFilter());
         this->setRasterizer(buffer.readRasterizer());
         this->setLooper(buffer.readDrawLooper());
-        SkSafeUnref(this->setImageFilter(buffer.readImageFilter()));
+        this->setImageFilter(buffer.readImageFilter());
 
         if (buffer.isVersionLT(SkReadBuffer::kAnnotationsMovedToCanvas_Version)) {
             // We used to store annotations here (string+skdata) if this bool was true
             if (buffer.readBool()) {
                 // Annotations have moved to drawAnnotation, so we just drop this one on the floor.
                 SkString key;
                 buffer.readString(&key);
                 (void)buffer.readByteArrayAsData();
             }
         }
@@ skipping 409 matching lines @@
 }
 
 uint32_t SkPaint::getHash() const {
     // We're going to hash 10 pointers and 7 32-bit values, finishing up with fBitfields,
     // so fBitfields should be 10 pointers and 6 32-bit values from the start.
     static_assert(offsetof(SkPaint, fBitfields) == 9 * sizeof(void*) + 6 * sizeof(uint32_t),
                   "SkPaint_notPackedTightly");
     return SkChecksum::Murmur3(reinterpret_cast<const uint32_t*>(this),
                                offsetof(SkPaint, fBitfields) + sizeof(fBitfields));
 }