Revert "Re-enable the unified media pipeline for JellyBean"

This reverts commit 1580687683f0814bfb8a6238b9b9243fff335ef9.

Disabling the unified media pipeline on JB until crashes are solved.

TBR=liberato
BUG=612909,597467

Review URL: https://codereview.chromium.org/2153623002 .

Cr-Commit-Position: refs/branch-heads/2785@{#127}
Cr-Branched-From: 68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}
1 file changed