PDF: Now threadsafe!

src/pdf/SkPDFGraphicState.h

Index: src/pdf/SkPDFGraphicState.h
diff --git a/src/pdf/SkPDFGraphicState.h b/src/pdf/SkPDFGraphicState.h
index a759d56b9f6585b82f6b26aa294a01c7563e50df..b26e4a00cba4cd8df5aa902d3206d1e750cd2600 100644
--- a/src/pdf/SkPDFGraphicState.h
+++ b/src/pdf/SkPDFGraphicState.h
@@ -47,7 +47,8 @@ public:
      *  other references.
      *  @param paint  The SkPaint to emulate.
      */
-    static SkPDFGraphicState* GetGraphicStateForPaint(const SkPaint& paint);
+    static SkPDFGraphicState* GetGraphicStateForPaint(SkPDFCanon* canon,
+                                                      const SkPaint& paint);
 
     /** Make a graphic state that only sets the passed soft mask. The
      *  reference count of the object is incremented and it is the caller's
@@ -74,12 +75,12 @@ public:
     static SkPDFGraphicState* CreateNoSMaskGraphicState();
 
 private:
+    SkPDFCanon* const fCanon;
     const SkPaint fPaint;
     bool fPopulated;
-    bool fSMask;
 
     SkPDFGraphicState();
-    explicit SkPDFGraphicState(const SkPaint& paint);
+    SkPDFGraphicState(SkPDFCanon* canon, const SkPaint& paint);
 
     void populateDict();