libwebp: update snapshot to v0.3.0-rc6

third_party/libwebp/utils/filters.h

 // Copyright 2011 Google Inc. All Rights Reserved.
 //
 // This code is licensed under the same terms as WebM:
 //  Software License Agreement:  http://www.webmproject.org/license/software/
 //  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
 // -----------------------------------------------------------------------------
 //
 // Spatial prediction using various filters
 //
 // Author: Urvang (urvang@google.com)
@@ skipping 12 matching lines @@
   WEBP_FILTER_NONE = 0,
   WEBP_FILTER_HORIZONTAL,
   WEBP_FILTER_VERTICAL,
   WEBP_FILTER_GRADIENT,
   WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1,  // end marker
   WEBP_FILTER_BEST,
   WEBP_FILTER_FAST
 } WEBP_FILTER_TYPE;
 
 typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height,
-                               int bpp, int stride, uint8_t* out);
+                               int stride, uint8_t* out);
+typedef void (*WebPUnfilterFunc)(int width, int height, int stride,
+                                 uint8_t* data);
 
 // Filter the given data using the given predictor.
 // 'in' corresponds to a 2-dimensional pixel array of size (stride * height)
 // in raster order.
-// 'bpp' is number of bytes per pixel, and
 // 'stride' is number of bytes per scan line (with possible padding).
 // 'out' should be pre-allocated.
 extern const WebPFilterFunc WebPFilters[WEBP_FILTER_LAST];
 
-// Reconstruct the original data from the given filtered data.
-extern const WebPFilterFunc WebPUnfilters[WEBP_FILTER_LAST];
+// In-place reconstruct the original data from the given filtered data.
+extern const WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST];
 
 // Fast estimate of a potentially good filter.
 extern WEBP_FILTER_TYPE EstimateBestFilter(const uint8_t* data,
                                            int width, int height, int stride);
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }    // extern "C"
 #endif
 
 #endif  /* WEBP_UTILS_FILTERS_H_ */