Switch the factory chunk in the skps to storing its size in bytes

include/core/SkStream.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkStream_DEFINED
 #define SkStream_DEFINED
 
@@ skipping 187 matching lines @@
     bool    writeText(const char text[]);
     bool    writeDecAsText(int32_t);
     bool    writeBigDecAsText(int64_t, int minDigits = 0);
     bool    writeHexAsText(uint32_t, int minDigits = 0);
     bool    writeScalarAsText(SkScalar);
 
     bool    writeBool(bool v) { return this->write8(v); }
     bool    writeScalar(SkScalar);
     bool    writePackedUInt(size_t);
 
-    bool writeStream(SkStream* input, size_t length);
+    bool    writeStream(SkStream* input, size_t length);
 
     /**
      * Append an SkData object to the stream, such that it can be read
      * out of the stream using SkStream::readData().
      *
      * Note that the encoding method used to write the SkData object
      * to the stream may change over time.  This method DOES NOT
      * just write the raw content of the SkData object to the stream.
      */
     bool writeData(const SkData*);
+
+    /**
+     * This returns the number of bytes in the stream required to store
+     * 'value'.
+     */
+    static int SizeOfPackedUInt(size_t value);
 };
 
 ////////////////////////////////////////////////////////////////////////////////////////
 
 #include "SkString.h"
 #include <stdio.h>
 
 struct SkFILE;
 
 /** A stream that wraps a C FILE* file stream. */
@@ skipping 216 matching lines @@
     virtual void newline() SK_OVERRIDE;
 
 private:
     typedef SkWStream INHERITED;
 };
 
 // for now
 typedef SkFILEStream SkURLStream;
 
 #endif