Android: Remove NEON check for enabling WebAudio on ARM.

This cannot be landed until CL 63193007 has landed.

BUG=320085

Review URL: https://codereview.chromium.org/67473012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236804 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236804