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

src/utils/SkMD5.h

Index: src/utils/SkMD5.h
===================================================================
--- src/utils/SkMD5.h	(revision 13672)
+++ src/utils/SkMD5.h	(working copy)
@@ -25,7 +25,7 @@
      *  Note that this treats the buffer as a series of uint8_t values.
      */
     virtual bool write(const void* buffer, size_t size) SK_OVERRIDE {
-        update(reinterpret_cast<const uint8_t*>(buffer), size);
+        this->update(reinterpret_cast<const uint8_t*>(buffer), size);
         return true;
     }