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Update Chromium's copy of libjpeg-turbo to the latest upstream
release (v2.0.90) and re-apply our local changes documented in
README.chromium.
Cherry-pick two additional changes from upstream to fix bugs found
by fuzzers:
1) https://github.com/libjpeg-turbo/libjpeg-turbo/commit/ccaba5d7894ecfb5a8f11e48d3f86e1f14d5a469
2) https://github.com/libjpeg-turbo/libjpeg-turbo/commit/c7ca521bc85b57d41d3ad4963c13fc0100481084
Significant changes provided by this update:
1) A large performance boost to JPEG encoding due to an improved
Huffman encoding implementation.
2) The complete removal of Arm Neon assembly code. This allows Arm's
control-flow integrity security features (Armv8.3-A Pointer
Authentication and Armv8.5-A Branch Target Identification) to be
switched on with the appropriate compiler flags.
Bug: 922430
Bug: b/135180511
Bug: 919548, 1145581
Change-Id: I319fcdc55b3fd5b219425c07a4e4a03587f4e06d
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In order to apply some performance updates from ARM, we need to update
libjpeg-turbo. These performance updates have yielded a 50% speedup on
some devices.
This CL updates our copy of libjpeg-turbo to v2.0.1 and re-applies our
local patches. This patch also deletes some extra files which were not
being used locally.
Update our local patch that was applied to fix http://crbug.com/398235
(https://codereview.appspot.com/229430043/). The original patch
incorrectly removed "& 0xFF" which limited an array index to within
that array's bounds (effectively reverting
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/fa1d18385d904d530b4aec83ab7757a33397de6e).
Restore the mask, making the array access safe and fixing a graphical
glitch which would otherwise be introduced by this change.
Bug:922430
Change-Id: I3860fdb424deecf7a17818ed09a640e632e71f8d
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(Duplicate of https://codereview.chromium.org/1939823002/ for landing.)
TBR=noel@chromium.org,thakis@chromium.org
BUG=608347, 398235, 591927
Review URL: https://codereview.chromium.org/1953443002 .
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It was submitted upstream at libjpeg_turbo as r1295 plus
sundry fixes and SIMD optimizations (r1385, r1386, r1398,
and r1402). Now cherry pick the change into
third_party/libjpeg-turbo.
At this time, this new capability is intended for Android
devices, not Chrome, and should have no affect on JPEG
decode behavior or perf of Chrome.
BUG=516761
R=noel@chromium.org
Review URL: https://codereview.chromium.org/1270213002 .
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