Reland of "switch patheffects over to sk_sp (patchset #5 id:80001 of https://codereview.chromium.or…

src/core/SkPathEffect.cpp

Index: src/core/SkPathEffect.cpp
diff --git a/src/core/SkPathEffect.cpp b/src/core/SkPathEffect.cpp
index 293bb53b2c416a55ce931b6c727e7d0e686a7047..b2e29bc09d9d30cd0ab2858a62b12fe6039c3055 100644
--- a/src/core/SkPathEffect.cpp
+++ b/src/core/SkPathEffect.cpp
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2006 The Android Open Source Project
  *
@@ -28,25 +27,19 @@ SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-SkPairPathEffect::SkPairPathEffect(SkPathEffect* pe0, SkPathEffect* pe1)
-        : fPE0(pe0), fPE1(pe1) {
-    SkASSERT(pe0);
-    SkASSERT(pe1);
-    fPE0->ref();
-    fPE1->ref();
-}
-
-SkPairPathEffect::~SkPairPathEffect() {
-    SkSafeUnref(fPE0);
-    SkSafeUnref(fPE1);
+SkPairPathEffect::SkPairPathEffect(sk_sp<SkPathEffect> pe0, sk_sp<SkPathEffect> pe1)
+    : fPE0(std::move(pe0)), fPE1(std::move(pe1))
+{
+    SkASSERT(fPE0.get());
+    SkASSERT(fPE1.get());
 }
 
 /*
     Format: [oe0-factory][pe1-factory][pe0-size][pe0-data][pe1-data]
 */
 void SkPairPathEffect::flatten(SkWriteBuffer& buffer) const {
-    buffer.writeFlattenable(fPE0);
-    buffer.writeFlattenable(fPE1);
+    buffer.writeFlattenable(fPE0.get());
+    buffer.writeFlattenable(fPE1.get());
 }
 
 #ifndef SK_IGNORE_TO_STRING
@@ -65,22 +58,13 @@ void SkPairPathEffect::toString(SkString* str) const {
 ///////////////////////////////////////////////////////////////////////////////
 
 SkFlattenable* SkComposePathEffect::CreateProc(SkReadBuffer& buffer) {
-    SkAutoTUnref<SkPathEffect> pe0(buffer.readPathEffect());
-    SkAutoTUnref<SkPathEffect> pe1(buffer.readPathEffect());
-    if (pe0 && pe1) {
-        return SkComposePathEffect::Create(pe0, pe1);
-    } else {
-        return nullptr;
-    }
+    sk_sp<SkPathEffect> pe0(buffer.readPathEffect());
+    sk_sp<SkPathEffect> pe1(buffer.readPathEffect());
+    return SkComposePathEffect::Make(std::move(pe0), std::move(pe1)).release();
 }
 
 bool SkComposePathEffect::filterPath(SkPath* dst, const SkPath& src,
                              SkStrokeRec* rec, const SkRect* cullRect) const {
-    // we may have failed to unflatten these, so we have to check
-    if (!fPE0 || !fPE1) {
-        return false;
-    }
-
     SkPath          tmp;
     const SkPath*   ptr = &src;
 
@@ -102,13 +86,9 @@ void SkComposePathEffect::toString(SkString* str) const {
 ///////////////////////////////////////////////////////////////////////////////
 
 SkFlattenable* SkSumPathEffect::CreateProc(SkReadBuffer& buffer) {
-    SkAutoTUnref<SkPathEffect> pe0(buffer.readPathEffect());
-    SkAutoTUnref<SkPathEffect> pe1(buffer.readPathEffect());
-    if (pe0 && pe1) {
-        return SkSumPathEffect::Create(pe0, pe1);
-    } else {
-        return nullptr;
-    }
+    sk_sp<SkPathEffect> pe0(buffer.readPathEffect());
+    sk_sp<SkPathEffect> pe1(buffer.readPathEffect());
+    return SkSumPathEffect::Make(pe0, pe1).release();
 }
 
 bool SkSumPathEffect::filterPath(SkPath* dst, const SkPath& src,