PDF: Canon now owns a reference to all interned objects

src/pdf/SkPDFGraphicState.cpp

Index: src/pdf/SkPDFGraphicState.cpp
diff --git a/src/pdf/SkPDFGraphicState.cpp b/src/pdf/SkPDFGraphicState.cpp
index 4ec0821974aabc9ba3cf988eecc733e944e0dab3..5732ef84bb6b72f26656860a798cb7da55763a6a 100644
--- a/src/pdf/SkPDFGraphicState.cpp
+++ b/src/pdf/SkPDFGraphicState.cpp
@@ -112,11 +112,7 @@ bool SkPDFGraphicState::equals(const SkPaint& paint) const {
     return equivalent(paint, fPaint);
 }
 
-SkPDFGraphicState::~SkPDFGraphicState() {
-    if (fCanon) {
-        fCanon->removeGraphicState(this);
-    }
-}
+SkPDFGraphicState::~SkPDFGraphicState() {}
 
 void SkPDFGraphicState::emitObject(SkWStream* stream, SkPDFCatalog* catalog) {
     populateDict();
@@ -132,7 +128,7 @@ SkPDFGraphicState* SkPDFGraphicState::GetGraphicStateForPaint(
         return SkRef(pdfGraphicState);
     }
     pdfGraphicState = new SkPDFGraphicState(canon, paint);
-    canon->addGraphicState(pdfGraphicState);
+    canon->addGraphicState(SkRef(pdfGraphicState));
     return pdfGraphicState;
 }