DEPS.xwalk: Move to Chromium 35.0.1908.4.
M35 gardening.

CL: https://codereview.chromium.org/183853011
M35 gardening.

CL: https://codereview.chromium.org/165893002
M35 gardening.

CL: https://codereview.chromium.org/198333004
M35 gardening.

CL: https://codereview.chromium.org/186883002
M35 gardening.

CL: https://codereview.chromium.org/172163003
M35 gardening.

CL: https://codereview.chromium.org/120303003
M35 gardening.

CL: https://codereview.chromium.org/126763003
M35 gardening.

CL: https://codereview.chromium.org/196413016
M35 gardening.

CL: https://codereview.chromium.org/199063003
[Tizen] Remove Mesa patch that's not needed anymore.

This was fixed differently upstream with r255915 in Chromium.