SkPngFilters: use normal pointer types.

src/codec/SkPngFilters.h

Index: src/codec/SkPngFilters.h
diff --git a/src/codec/SkPngFilters.h b/src/codec/SkPngFilters.h
index 5fc446881c6f8aa93a88597ff604da4c54ef0dc8..32708107d0da3fc7e47b8f609ea869c6388a6681 100644
--- a/src/codec/SkPngFilters.h
+++ b/src/codec/SkPngFilters.h
@@ -9,18 +9,19 @@
 #define SkPngFilters_DEFINED
 
 #include "png.h"
+#include "SkTypes.h"
 
 // We don't bother specializing Up...
 // it's so simple it's usually already perfectly autovectorized.
 
 // These all require bpp=3 (i.e. RGB).
-void   sk_sub3_sse2(png_row_infop, png_bytep, png_const_bytep);
-void   sk_avg3_sse2(png_row_infop, png_bytep, png_const_bytep);
-void sk_paeth3_sse2(png_row_infop, png_bytep, png_const_bytep);
+void   sk_sub3_sse2(png_row_infop, uint8_t*, const uint8_t*);
+void   sk_avg3_sse2(png_row_infop, uint8_t*, const uint8_t*);
+void sk_paeth3_sse2(png_row_infop, uint8_t*, const uint8_t*);
 
 // These all require bpp=4 (i.e. RGBA).
-void   sk_sub4_sse2(png_row_infop, png_bytep, png_const_bytep);
-void   sk_avg4_sse2(png_row_infop, png_bytep, png_const_bytep);
-void sk_paeth4_sse2(png_row_infop, png_bytep, png_const_bytep);
+void   sk_sub4_sse2(png_row_infop, uint8_t*, const uint8_t*);
+void   sk_avg4_sse2(png_row_infop, uint8_t*, const uint8_t*);
+void sk_paeth4_sse2(png_row_infop, uint8_t*, const uint8_t*);
 
 #endif//SkPngFilterOpts_DEFINED