Roll src/third_party/libgav1/src/ e46493b91..a9449e612 (86 commits)

https://chromium.googlesource.com/codecs/libgav1.git/+log/e46493b9148e..a9449e612bc2

$ git log e46493b91..a9449e612 --date=short --no-merges --format='%ad %ae %s'
2020-08-17 vigneshv Set frame parallel threshold multiplier to 3
2020-08-17 linfengz trivial: call Clip3() in Tile::BuildConvolveBlock()
2020-08-17 linfengz dsp,trivial: update WienerFilter_SSE4_1()
2020-08-17 linfengz fix fuzz bugs in PostFilter::ApplySuperResThreaded()
2020-08-14 jzern inverse_transform,GetNumRows: expand some conditions
2020-08-14 linfengz update PostFilter::ExtendFrame()
2020-08-14 linfengz dsp: update ComputeSuperRes()
2020-08-14 linfengz dsp: update ComputeSuperRes() dsp functions
2020-08-13 jzern ReadSymbolWithoutCdfUpdate: pass a single uint16_t
2020-08-13 linfengz update PostFilter::ApplySuperResThreaded()
(...)
2020-07-14 jzern entropy_decoder: LSB align cached bits
2020-07-14 wtc Automated rollback of commit dda67c1927bf5878a069df9be136551317f82e0e.
2020-07-14 wtc Clear reference frames if key frame and show_frame
2020-07-13 jzern symbol_decoder_context: align cdf tables
2020-07-13 wtc Only wait for the ref frames used by current frame
2020-07-13 vigneshv trivial: Rename MoveTileBuffer to MoveTileBuffers
2020-07-13 wtc Skip MarkInvalidReferenceFrames if show key frame
2020-07-13 wtc Don't validate primary_reference_frame twice
2020-07-13 wtc Initialize the reference_frame_index array to -1
2020-07-13 jzern entropy_decoder,sse4: add some missing casts

Created with:
  roll-dep src/third_party/libgav1/src

Test: media_unittest --gtest_filter=Gav1* on x86
Change-Id: I20b08161d20e1f3c2a465ee79a94872e5f6e1d36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2381015
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803000}

DEPS

@@ -944,7 +944,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/google/emoji-segmenter.git' + '@' + Var('emoji_segmenter_revision'),
 
   'src/third_party/libgav1/src':
-    Var('chromium_git') + '/codecs/libgav1.git' + '@' + 'e46493b9148e0d1e63f55b5890bff503822616e5',
+    Var('chromium_git') + '/codecs/libgav1.git' + '@' + 'a9449e612bc251b4271bbe1e3a0d12e9809bf74c',
 
   'src/third_party/glslang/src':
     Var('chromium_git') + '/external/github.com/KhronosGroup/glslang.git' + '@' + '517f39eee46f27c83527117d831c4d7e2f7c9fe3',

third_party/libgav1/README.chromium

@@ -2,9 +2,9 @@ Name: libgav1
 Short Name: libgav1
 URL: https://chromium.googlesource.com/codecs/libgav1/
 Version: 0
-Date: Tuesday July 14 2020
+Date: Saturday August 22 2020
 Branch: master
-Commit: e46493b9148e0d1e63f55b5890bff503822616e5
+Commit: a9449e612bc251b4271bbe1e3a0d12e9809bf74c
 License: Apache 2.0
 License File: libgav1/LICENSE
 Security Critical: yes