Simplify reference management in SkPDF

src/pdf/SkPDFGraphicState.cpp

Index: src/pdf/SkPDFGraphicState.cpp
diff --git a/src/pdf/SkPDFGraphicState.cpp b/src/pdf/SkPDFGraphicState.cpp
index 0e0873d9f0c8cc60bfb12e510f47f50559f6f411..77379ed2feb3240331d830860b8966276257a45d 100644
--- a/src/pdf/SkPDFGraphicState.cpp
+++ b/src/pdf/SkPDFGraphicState.cpp
@@ -117,13 +117,6 @@ SkPDFGraphicState::~SkPDFGraphicState() {
     if (!fSMask) {
         SkPDFCanon::GetCanon().removeGraphicState(this);
     }
-    fResources.unrefAll();
-}
-
-void SkPDFGraphicState::getResources(
-        const SkTSet<SkPDFObject*>& knownResourceObjects,
-        SkTSet<SkPDFObject*>* newResourceObjects) {
-    GetResourcesHelper(&fResources, knownResourceObjects, newResourceObjects);
 }
 
 void SkPDFGraphicState::emitObject(SkWStream* stream, SkPDFCatalog* catalog) {
@@ -196,13 +189,9 @@ SkPDFGraphicState* SkPDFGraphicState::GetSMaskGraphicState(
     result->fSMask = true;
     result->insertName("Type", "ExtGState");
     result->insert("SMask", sMaskDict.get());
-    result->fResources.push(sMask);
-    sMask->ref();
 
     if (invert) {
         SkPDFObject* invertFunction = GetInvertFunction();
-        result->fResources.push(invertFunction);
-        invertFunction->ref();
         sMaskDict->insert("TR", new SkPDFObjRef(invertFunction))->unref();

[mtklein, 2015/01/26 23:38:59]

Might move the call to GetInvertFunction() right in line?

[hal.canary, 2015/02/09 23:35:01]

Done.

     }