Bug 829907: release video capture device on MainThread (mac only) r=bsmedberg
Bug 841456 - Enable metro on windows l10n builds. r=jimm DONTBUILD
Bug 841197 - Upgrading from older nightly that has been set as default browser now shows metro tile. r=jimm
Merge the last PGO-green inbound changeset to m-c.
Merge m-c to inbound.
Bug 834127 - Make Plugin Hang UI dialog unowned. r=bsmedberg
Bug 839714 - Extend PlayPreview API. r=jschoenick, r=jwein