DEPS.xwalk: Roll chromium-crosswalk (e36755c -> 5557d51).

5557d51 Merge pull request #224 from nagineni/murphy_proplist
8175fa4 [Tizen] Set the resource set "name" property instead of "appid"
9f1cfce Merge pull request #221 from rakuco/platformwindow-style-fix
2ea694a Fix the coding style after 64cb021.