Revert "Update libwebp to 0.6.0-pre"

This reverts commit e2f6ffbf49671713356881af70a093e99e80bd31.

Reason for revert:

iOS build failures, see https://luci-milo.appspot.com/swarming/task/33e5e02cf8419d10/steps/build_iOSShell/0/stdout

Original change's description:
> Update libwebp to 0.6.0-pre
> 
> Corresponds with Android change
> https://android-review.googlesource.com/#/c/326439/
> 
> "this prerelease snapshot includes encoder and performance
> improvements"
> 
> Update build file
> * Many files have been renamed from
>     src/<subdir>/<name>.c
>       to
>     src/<subdir>/<name>_<subdir>.c
> 
> * Build new files (*_msa.c, *_neon.c, predictor_enc.c)
> 
> This should fix issue 5876, which was caused by a compiler bug.
> With the added NEON implementation, we will no longer trigger
> the bug.
> 
> BUG=skia:5876
> 
> Change-Id: I0fcce4362ee70138547b1d23aa9ef537a4126e73
> Reviewed-on: https://skia-review.googlesource.com/7376
> Reviewed-by: Matt Sarett <msarett@google.com>
> Commit-Queue: Leon Scroggins <scroggo@google.com>
> 

TBR=msarett@google.com,scroggo@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:5876

Change-Id: Ib81f63861d9f1c6936bd7f790b5e16a9544a4df0
Reviewed-on: https://skia-review.googlesource.com/7420
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 42 insertions, 51 deletions

diff --git a/third_party/libwebp/BUILD.gn b/third_party/libwebp/BUILD.gn
index 1157e4ba3b..e7dc336534 100644
--- a/third_party/libwebp/BUILD.gn
+++ b/third_party/libwebp/BUILD.gn
@@ -35,20 +35,19 @@ if (skia_use_system_libwebp) {
     ]
 
     sources = [
-      "../externals/libwebp/src/dec/alpha_dec.c",
-      "../externals/libwebp/src/dec/buffer_dec.c",
-      "../externals/libwebp/src/dec/frame_dec.c",
-      "../externals/libwebp/src/dec/idec_dec.c",
-      "../externals/libwebp/src/dec/io_dec.c",
-      "../externals/libwebp/src/dec/quant_dec.c",
-      "../externals/libwebp/src/dec/tree_dec.c",
-      "../externals/libwebp/src/dec/vp8_dec.c",
-      "../externals/libwebp/src/dec/vp8l_dec.c",
-      "../externals/libwebp/src/dec/webp_dec.c",
+      "../externals/libwebp/src/dec/alpha.c",
+      "../externals/libwebp/src/dec/buffer.c",
+      "../externals/libwebp/src/dec/frame.c",
+      "../externals/libwebp/src/dec/idec.c",
+      "../externals/libwebp/src/dec/io.c",
+      "../externals/libwebp/src/dec/quant.c",
+      "../externals/libwebp/src/dec/tree.c",
+      "../externals/libwebp/src/dec/vp8.c",
+      "../externals/libwebp/src/dec/vp8l.c",
+      "../externals/libwebp/src/dec/webp.c",
       "../externals/libwebp/src/demux/demux.c",
       "../externals/libwebp/src/dsp/alpha_processing.c",
       "../externals/libwebp/src/dsp/alpha_processing_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/alpha_processing_neon.c",
       "../externals/libwebp/src/dsp/alpha_processing_sse2.c",
       "../externals/libwebp/src/dsp/alpha_processing_sse41.c",
       "../externals/libwebp/src/dsp/argb.c",
@@ -70,75 +69,67 @@ if (skia_use_system_libwebp) {
       "../externals/libwebp/src/dsp/enc_avx2.c",
       "../externals/libwebp/src/dsp/enc_mips32.c",
       "../externals/libwebp/src/dsp/enc_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/enc_msa.c",
       "../externals/libwebp/src/dsp/enc_neon.c",
       "../externals/libwebp/src/dsp/enc_sse2.c",
       "../externals/libwebp/src/dsp/enc_sse41.c",
       "../externals/libwebp/src/dsp/filters.c",
       "../externals/libwebp/src/dsp/filters_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/filters_msa.c",
-      "../externals/libwebp/src/dsp/filters_neon.c",
       "../externals/libwebp/src/dsp/filters_sse2.c",
       "../externals/libwebp/src/dsp/lossless.c",
       "../externals/libwebp/src/dsp/lossless_enc.c",
       "../externals/libwebp/src/dsp/lossless_enc_mips32.c",
       "../externals/libwebp/src/dsp/lossless_enc_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/lossless_enc_msa.c",
       "../externals/libwebp/src/dsp/lossless_enc_neon.c",
       "../externals/libwebp/src/dsp/lossless_enc_sse2.c",
       "../externals/libwebp/src/dsp/lossless_enc_sse41.c",
       "../externals/libwebp/src/dsp/lossless_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/lossless_msa.c",
       "../externals/libwebp/src/dsp/lossless_neon.c",
       "../externals/libwebp/src/dsp/lossless_sse2.c",
       "../externals/libwebp/src/dsp/rescaler.c",
       "../externals/libwebp/src/dsp/rescaler_mips32.c",
       "../externals/libwebp/src/dsp/rescaler_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/rescaler_msa.c",
       "../externals/libwebp/src/dsp/rescaler_neon.c",
       "../externals/libwebp/src/dsp/rescaler_sse2.c",
       "../externals/libwebp/src/dsp/upsampling.c",
       "../externals/libwebp/src/dsp/upsampling_mips_dsp_r2.c",
-      "../externals/libwebp/src/dsp/upsampling_msa.c",
       "../externals/libwebp/src/dsp/upsampling_neon.c",
       "../externals/libwebp/src/dsp/upsampling_sse2.c",
       "../externals/libwebp/src/dsp/yuv.c",
       "../externals/libwebp/src/dsp/yuv_mips32.c",
       "../externals/libwebp/src/dsp/yuv_mips_dsp_r2.c",
       "../externals/libwebp/src/dsp/yuv_sse2.c",
-      "../externals/libwebp/src/enc/alpha_enc.c",
-      "../externals/libwebp/src/enc/analysis_enc.c",
-      "../externals/libwebp/src/enc/backward_references_enc.c",
-      "../externals/libwebp/src/enc/config_enc.c",
-      "../externals/libwebp/src/enc/cost_enc.c",
-      "../externals/libwebp/src/enc/filter_enc.c",
-      "../externals/libwebp/src/enc/frame_enc.c",
-      "../externals/libwebp/src/enc/histogram_enc.c",
-      "../externals/libwebp/src/enc/iterator_enc.c",
-      "../externals/libwebp/src/enc/near_lossless_enc.c",
-      "../externals/libwebp/src/enc/picture_csp_enc.c",
-      "../externals/libwebp/src/enc/picture_enc.c",
-      "../externals/libwebp/src/enc/picture_psnr_enc.c",
-      "../externals/libwebp/src/enc/picture_rescale_enc.c",
-      "../externals/libwebp/src/enc/picture_tools_enc.c",
-      "../externals/libwebp/src/enc/predictor_enc.c",
-      "../externals/libwebp/src/enc/quant_enc.c",
-      "../externals/libwebp/src/enc/syntax_enc.c",
-      "../externals/libwebp/src/enc/token_enc.c",
-      "../externals/libwebp/src/enc/tree_enc.c",
-      "../externals/libwebp/src/enc/vp8l_enc.c",
-      "../externals/libwebp/src/enc/webp_enc.c",
-      "../externals/libwebp/src/utils/bit_reader_utils.c",
-      "../externals/libwebp/src/utils/bit_writer_utils.c",
-      "../externals/libwebp/src/utils/color_cache_utils.c",
-      "../externals/libwebp/src/utils/filters_utils.c",
-      "../externals/libwebp/src/utils/huffman_encode_utils.c",
-      "../externals/libwebp/src/utils/huffman_utils.c",
-      "../externals/libwebp/src/utils/quant_levels_dec_utils.c",
-      "../externals/libwebp/src/utils/quant_levels_utils.c",
-      "../externals/libwebp/src/utils/random_utils.c",
-      "../externals/libwebp/src/utils/rescaler_utils.c",
-      "../externals/libwebp/src/utils/thread_utils.c",
+      "../externals/libwebp/src/enc/alpha.c",
+      "../externals/libwebp/src/enc/analysis.c",
+      "../externals/libwebp/src/enc/backward_references.c",
+      "../externals/libwebp/src/enc/config.c",
+      "../externals/libwebp/src/enc/cost.c",
+      "../externals/libwebp/src/enc/filter.c",
+      "../externals/libwebp/src/enc/frame.c",
+      "../externals/libwebp/src/enc/histogram.c",
+      "../externals/libwebp/src/enc/iterator.c",
+      "../externals/libwebp/src/enc/near_lossless.c",
+      "../externals/libwebp/src/enc/picture.c",
+      "../externals/libwebp/src/enc/picture_csp.c",
+      "../externals/libwebp/src/enc/picture_psnr.c",
+      "../externals/libwebp/src/enc/picture_rescale.c",
+      "../externals/libwebp/src/enc/picture_tools.c",
+      "../externals/libwebp/src/enc/quant.c",
+      "../externals/libwebp/src/enc/syntax.c",
+      "../externals/libwebp/src/enc/token.c",
+      "../externals/libwebp/src/enc/tree.c",
+      "../externals/libwebp/src/enc/vp8l.c",
+      "../externals/libwebp/src/enc/webpenc.c",
+      "../externals/libwebp/src/utils/bit_reader.c",
+      "../externals/libwebp/src/utils/bit_writer.c",
+      "../externals/libwebp/src/utils/color_cache.c",
+      "../externals/libwebp/src/utils/filters.c",
+      "../externals/libwebp/src/utils/huffman.c",
+      "../externals/libwebp/src/utils/huffman_encode.c",
+      "../externals/libwebp/src/utils/quant_levels.c",
+      "../externals/libwebp/src/utils/quant_levels_dec.c",
+      "../externals/libwebp/src/utils/random.c",
+      "../externals/libwebp/src/utils/rescaler.c",
+      "../externals/libwebp/src/utils/thread.c",
       "../externals/libwebp/src/utils/utils.c",
     ]
   }