Update C++11 Style Guide to allow std::array
Update C++11 Style Guide to allow std::array

Discussion thread here: https://groups.google.com/a/chromium.org/forum/#!topic/cxx/pVRQCRWHEU8
Test CQ here: crrev.com/1482463003

BUG=

Review URL: https://codereview.chromium.org/1483183002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#362301}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk