Bumping gaia.json for 1 gaia-central revision(s)
Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-central/rev/461e2be993c7
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 887356 - Homescreen grid test failing on TBPL r=crdlc

This uses sinon to make this sometimes failing test synchronous.