Make SkStream *not* ref counted.

src/core/SkPictureData.h

Index: src/core/SkPictureData.h
diff --git a/src/core/SkPictureData.h b/src/core/SkPictureData.h
index ab78f8a313c9bcb3fcc88156435987fe326edfe6..cada8d1f6632b349238172cec96aa811546046a4 100644
--- a/src/core/SkPictureData.h
+++ b/src/core/SkPictureData.h
@@ -58,6 +58,7 @@ struct SkPictInfo {
 class SkPictureData {
 public:
     SkPictureData(const SkPictureRecord& record, const SkPictInfo&, bool deepCopyOps);
+    // Does not affect ownership of SkStream.
     static SkPictureData* CreateFromStream(SkStream*,
                                            const SkPictInfo&,
                                            SkPicture::InstallPixelRefProc);
@@ -79,6 +80,7 @@ public:
 protected:
     explicit SkPictureData(const SkPictInfo& info);
 
+    // Does not affect ownership of SkStream.
     bool parseStream(SkStream*, SkPicture::InstallPixelRefProc);
     bool parseBuffer(SkReadBuffer& buffer);
 
@@ -135,6 +137,7 @@ private:
     void init();
 
     // these help us with reading/writing
+    // Does not affect ownership of SkStream.
     bool parseStreamTag(SkStream*, uint32_t tag, uint32_t size, SkPicture::InstallPixelRefProc);
     bool parseBufferTag(SkReadBuffer&, uint32_t tag, uint32_t size);
     void flattenToBuffer(SkWriteBuffer&) const;