Revert of Roll libvpx: cc9c0c:8dc6ea (patchset #3 id:40001 of https://codereview.chromium.org/845453005/)

Reason for revert:
Suspected to cause multiple tests failure on win vista bot

http://build.chromium.org/p/chromium.win/builders/Vista%20Tests%20%281%29?numbuilds=50
http://build.chromium.org/p/chromium.win/builders/Vista%20Tests%20%281%29/builds/52775

Original issue's description:
> Roll libvpx: cc9c0c:8dc6ea
>
> Turn on AVX2 optimizations
> https://codereview.chromium.org/863143002
>
> Add them to GN build file:
> https://codereview.chromium.org/865893004
>
> Correct CPU detection:
> https://codereview.chromium.org//864393002
>
> Win GN build flag:
> https://codereview.chromium.org//817293008
>
> R=tomfinegan@chromium.org
>
> Committed: https://crrev.com/efd856c2a46810e742f7aba0130d534783db6b2a
> Cr-Commit-Position: refs/heads/master@{#312712}

TBR=tomfinegan@chromium.org,thakis@chromium.org,johannkoenig@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/869973003

Cr-Commit-Position: refs/heads/master@{#312817}

1 files changed, 1 insertions, 1 deletions

diff --git a/DEPS b/DEPS
index c91cff7..d6a0922 100644
--- a/DEPS
+++ b/DEPS
@@ -40,7 +40,7 @@ vars = {
   'pdfium_git': 'https://pdfium.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'boringssl_git': 'https://boringssl.googlesource.com',
-  'libvpx_revision': '8dc6ea93de62df4fb4d8bcc6156c3ad4df158bb3',
+  'libvpx_revision': 'cc9c0c5198e416173f480fb1f11e052f5c29a95b',
   'sfntly_revision': '1bdaae8fc788a5ac8936d68bf24f37d977a13dac',
   'skia_revision': 'cada95ad9b8e6be9bdffe1a70968a2102cc3f09d',
   # Three lines of non-changing comments so that