Revert of Update libwebp to version 0.5.0 (patchset #2 id:20001 of https://codereview.chromium.org/1601253003/ )

Reason for revert:
Seems to be causing bots to fail:
https://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Arm7-Release-Android_NoNeon/builds/4032
https://build.chromium.org/p/client.skia.android/builders/Perf-Android-GCC-Nexus5-CPU-NEON-Arm7-Release/builds/3239
https://build.chromium.org/p/client.skia.android/builders/Perf-Android-GCC-Nexus5-GPU-Adreno330-Arm7-Release/builds/1887
https://build.chromium.org/p/client.skia.fyi/builders/Perf-Android-GCC-Nexus5-GPU-Adreno330-Arm7-Release-Appurify/builds/2075
https://build.chromium.org/p/client.skia.android/builders/Test-Android-GCC-Nexus5-CPU-NEON-Arm7-Debug/builds/2136
https://build.chromium.org/p/client.skia.android/builders/Test-Android-GCC-Nexus5-CPU-NEON-Arm7-Release/builds/3850
https://build.chromium.org/p/client.skia.android/builders/Test-Android-GCC-Nexus5-GPU-Adreno330-Arm7-Debug/builds/2078
https://build.chromium.org/p/client.skia.android/builders/Test-Android-GCC-Nexus5-GPU-Adreno330-Arm7-Release/builds/2000
https://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Arm7-Debug-Android_NoNeon/builds/4098

Original issue's description:
> Update libwebp to version 0.5.0
>
> This is the version used by Android.
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1601253003
>
> Committed: https://skia.googlesource.com/skia/+/fe35455210294c3d9de9d0d9534743acfade523d

TBR=msarett@google.com,scroggo@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1601083004
2 files changed