First step in pulling SkPicturePlayback & SkPictureRecord out of SkPicture

include/core/SkPicture.h

Index: include/core/SkPicture.h
===================================================================
--- include/core/SkPicture.h	(revision 14323)
+++ include/core/SkPicture.h	(working copy)
@@ -23,6 +23,7 @@
 class SkCanvas;
 class SkDrawPictureCallback;
 class SkData;
+class SkPathHeap;
 class SkPicturePlayback;
 class SkPictureRecord;
 class SkStream;
@@ -358,6 +359,23 @@
     SkCanvas* beginRecording(int width, int height, SkBBHFactory* factory, uint32_t recordFlags);
 
 private:
+    friend class SkPictureRecord;
+    friend class SkPictureTester;   // for unit testing
+
+    SkAutoTUnref<SkPathHeap> fPathHeap;  // reference counted
+
+    const SkPath& getPath(int index) const;
+    int addPathToHeap(const SkPath& path);
+
+    void flattenToBuffer(SkWriteBuffer& buffer) const;
+    bool parseBufferTag(SkReadBuffer& buffer, uint32_t tag, uint32_t size);
+
+    static void WriteTagSize(SkWriteBuffer& buffer, uint32_t tag, size_t size);
+    static void WriteTagSize(SkWStream* stream, uint32_t tag, size_t size);
+
+    void initForPlayback() const;
+    void dumpSize() const;
+
     // An OperationList encapsulates a set of operation offsets into the picture byte
     // stream along with the CTMs needed for those operation.
     class OperationList : ::SkNoncopyable {