Revert "Allow supporting 1 older PICTURE_VERSION."

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 157c4cafb6afb93a0dfb6b1a22ca23f587997169..b2c2b62edec4ee3684dc4ef4ef3129a1e29f2ad8 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -192,6 +192,7 @@ public:
     void abortPlayback();
 #endif
 
+protected:
     // V2 : adds SkPixelRef's generation ID.
     // V3 : PictInfo tag at beginning, and EOF tag at the end
     // V4 : move SkPictInfo to be the header
@@ -205,7 +206,6 @@ public:
     // V11: modify how readBitmap and writeBitmap store their info.
     static const uint32_t PICTURE_VERSION = 11;
 
-protected:
     // fPlayback, fRecord, fWidth & fHeight are protected to allow derived classes to
     // install their own SkPicturePlayback-derived players,SkPictureRecord-derived
     // recorders and set the picture size