Bug 971554 - [System2] Instantiable SoundManager
Revert "Merge pull request #17673 from marshall/ftuPing"

This reverts commit c3c12544f7acbf0e66d7d481c0718634e068d3ce, reversing
changes made to d84935863b56ea76d7d33486f44a64467a70885f.
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Merge branch 'master' of https://github.com/mozilla-b2g/gaia
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 11c85ad98bf9ba1f8d37f7e07a778b3c5b712198, reversing
changes made to 601118bc1f479d8f94ef4beb78c36b5a0bcdcf85.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 601118bc1f479d8f94ef4beb78c36b5a0bcdcf85, reversing
changes made to cb090fc1bc5d60c0e810dc33c3e0ef46ee678a23.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit cb090fc1bc5d60c0e810dc33c3e0ef46ee678a23, reversing
changes made to 520aa82e0c5e0a1f90544a682e779bf9b8af1e93.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 520aa82e0c5e0a1f90544a682e779bf9b8af1e93, reversing
changes made to 2b64b43391a8a747b6381bdf072fd94265ae8909.
Revert "Merge branch 'master' of https://github.com/mozilla-b2g/gaia"

This reverts commit 2b64b43391a8a747b6381bdf072fd94265ae8909, reversing
changes made to 2a3ac3962b898f934e224741d839f5bc6d18c542.
Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window
Merge pull request #16282 from ian-liu/system/bug964653_system_dialog_refactor

Bug 964653 - (system-dialog) [Window Management] Implement System Dialog Window, r=@alivedise
Merge pull request #16553 from huchengtw-moz/system/Bug_971554_instantiable_soundmanager

Bug 971554 - [System2] Instantiable SoundManager, r=alive
Bug 971512 - [System] Instantiable layout manager