libwebp: update snapshot to v0.2.0-rc1

third_party/libwebp/dsp/enc_sse2.c

-// Copyright 2011 Google Inc.
+// 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/
 // -----------------------------------------------------------------------------
 //
 // SSE2 version of speed-critical encoding functions.
 //
 // Author: Christian Duvivier (cduvivier@google.com)
 
-#if defined(__SSE2__) || defined(_MSC_VER)
+#include "./dsp.h"
+
+#if defined(WEBP_USE_SSE2)
+#include <stdlib.h>  // for abs()
 #include <emmintrin.h>
 
 #include "../enc/vp8enci.h"
 
 #if defined(__cplusplus) || defined(c_plusplus)
 extern "C" {
 #endif
 
 //------------------------------------------------------------------------------
 // Compute susceptibility based on DCT-coeff histograms:
@@ skipping 801 matching lines @@
   VP8FTransform = FTransformSSE2;
   VP8SSE4x4 = SSE4x4SSE2;
   VP8TDisto4x4 = Disto4x4SSE2;
   VP8TDisto16x16 = Disto16x16SSE2;
 }
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }    // extern "C"
 #endif
 
-#endif   //__SSE2__
+#endif   // WEBP_USE_SSE2