Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/sfnt/pngshim.h

Index: third_party/freetype2/src/src/sfnt/pngshim.h
diff --git a/third_party/freetype2/src/src/sfnt/pngshim.h b/third_party/freetype2/src/src/sfnt/pngshim.h
new file mode 100644
index 0000000000000000000000000000000000000000..4cc5c2b3a058f8f4f468246a091cff3fa920d22d
--- /dev/null
+++ b/third_party/freetype2/src/src/sfnt/pngshim.h
@@ -0,0 +1,50 @@
+/***************************************************************************/
+/*                                                                         */
+/*  pngshim.h                                                              */
+/*                                                                         */
+/*    PNG Bitmap glyph support.                                            */
+/*                                                                         */
+/*  Copyright 2013-2015 by                                                 */
+/*  Google, Inc.                                                           */
+/*  Written by Stuart Gill and Behdad Esfahbod.                            */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+
+#ifndef __PNGSHIM_H__
+#define __PNGSHIM_H__
+
+
+#include <ft2build.h>
+#include "ttload.h"
+
+
+FT_BEGIN_HEADER
+
+#ifdef FT_CONFIG_OPTION_USE_PNG
+
+  FT_LOCAL( FT_Error )
+  Load_SBit_Png( FT_GlyphSlot     slot,
+                 FT_Int           x_offset,
+                 FT_Int           y_offset,
+                 FT_Int           pix_bits,
+                 TT_SBit_Metrics  metrics,
+                 FT_Memory        memory,
+                 FT_Byte*         data,
+                 FT_UInt          png_len,
+                 FT_Bool          populate_map_and_metrics );
+
+#endif
+
+FT_END_HEADER
+
+#endif /* __PNGSHIM_H__ */
+
+
+/* END */