Update libvpx

Pull latest version from upstream. This had to be broken up across several
changes. The first has the commit message:
https://codereview.chromium.org/55493002/

Remove AVX code until we update the gyp files:
https://codereview.chromium.org/48903015/

libmkv has moved to third_party/libmkv:
https://codereview.chromium.org/54373014/
media/webm/chromeos/webm_encoder.cc and
media/webm/chromeon/ebml_writer.cc pull from this location
as well and needs to be updated.

R=fischman@chromium.org, tomfinegan@chromium.org

Review URL: https://codereview.chromium.org/54333009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232493 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232494 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232493
telemetry: wait until document has loaded in canvas bench

Smoothness measurement on Android currently finishes before some pages was even loaded. This patch makes smoothness wait until document.readyState == 'complete'.

The patch also disables the Fireflies test case, which currently crashes on Galaxy Nexus.

R=tonyg@chromium.org,alokp@chromium.org
BUG=311582,314131

Review URL: https://codereview.chromium.org/48903014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232495 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232494
Clear content protection platform keys on Chrome OS.

When a user chooses to deauthorize content licenses we also want to
remove keys and certificates that may have been used in platform
verification for content protection.

BUG=chromium:280016
TEST=unit, manual

Review URL: https://codereview.chromium.org/50143007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232496 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232496
Retrying Aura badge removal from Wrench Menu.

Original Issue: https://codereview.chromium.org/49383007/
Original description:
As we no more need to differentiate between Aura and non-Aura chrome, removing aura badge from wrench menu.

Original Commit: https://src.chromium.org/viewvc/chrome?view=rev&revision=232216

R=cpu,ananta
TBR=oshima,sky
BUG=313473

Review URL: https://codereview.chromium.org/55653002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232497 0039d316-1c4b-4281-b951-d872f2087c98
Enable some accessibility tests on Win aura

BUG=none

Review URL: https://codereview.chromium.org/56073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232498 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232498