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

src/core/SkReadBuffer.h

Index: src/core/SkReadBuffer.h
diff --git a/src/core/SkReadBuffer.h b/src/core/SkReadBuffer.h
index 7ce6d048e9b22319d70b8d2cfa2e7570fb52a7e4..c7ac8480eceddbeb35d5b475620a8a866dd60710 100644
--- a/src/core/SkReadBuffer.h
+++ b/src/core/SkReadBuffer.h
@@ -134,7 +134,9 @@ public:
     SkDrawLooper*  readDrawLooper()  { return this->readFlattenable<SkDrawLooper>(); }
     SkImageFilter* readImageFilter() { return this->readFlattenable<SkImageFilter>(); }
     SkMaskFilter*  readMaskFilter()  { return this->readFlattenable<SkMaskFilter>(); }
-    SkPathEffect*  readPathEffect()  { return this->readFlattenable<SkPathEffect>(); }
+    sk_sp<SkPathEffect> readPathEffect()  {
+        return sk_sp<SkPathEffect>(this->readFlattenable<SkPathEffect>());
+    }
     SkRasterizer*  readRasterizer()  { return this->readFlattenable<SkRasterizer>(); }
     sk_sp<SkShader> readShader()     { return sk_sp<SkShader>(this->readFlattenable<SkShader>()); }
     SkXfermode*    readXfermode()    { return this->readFlattenable<SkXfermode>(); }