Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/autofit/afwarp.h

Index: third_party/freetype2/src/src/autofit/afwarp.h
diff --git a/third_party/freetype2/src/src/autofit/afwarp.h b/third_party/freetype2/src/src/autofit/afwarp.h
new file mode 100644
index 0000000000000000000000000000000000000000..6069b6b277b453871fa27ec7108e4aafeeba3246
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+++ b/third_party/freetype2/src/src/autofit/afwarp.h
@@ -0,0 +1,64 @@
+/***************************************************************************/
+/*                                                                         */
+/*  afwarp.h                                                               */
+/*                                                                         */
+/*    Auto-fitter warping algorithm (specification).                       */
+/*                                                                         */
+/*  Copyright 2006-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  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 __AFWARP_H__
+#define __AFWARP_H__
+
+#include "afhints.h"
+
+FT_BEGIN_HEADER
+
+#define AF_WARPER_SCALE
+
+#define AF_WARPER_FLOOR( x )  ( (x) & ~FT_TYPEOF( x )63 )
+#define AF_WARPER_CEIL( x )   AF_WARPER_FLOOR( (x) + 63 )
+
+
+  typedef FT_Int32  AF_WarpScore;
+
+  typedef struct  AF_WarperRec_
+  {
+    FT_Pos        x1, x2;
+    FT_Pos        t1, t2;
+    FT_Pos        x1min, x1max;
+    FT_Pos        x2min, x2max;
+    FT_Pos        w0, wmin, wmax;
+
+    FT_Fixed      best_scale;
+    FT_Pos        best_delta;
+    AF_WarpScore  best_score;
+    AF_WarpScore  best_distort;
+
+  } AF_WarperRec, *AF_Warper;
+
+
+  FT_LOCAL( void )
+  af_warper_compute( AF_Warper      warper,
+                     AF_GlyphHints  hints,
+                     AF_Dimension   dim,
+                     FT_Fixed      *a_scale,
+                     FT_Fixed      *a_delta );
+
+
+FT_END_HEADER
+
+
+#endif /* __AFWARP_H__ */
+
+
+/* END */