Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/5ae393686108
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #13091 from fcampo/wifi-timeout-889623

Bug 889623 - [FTE] need to be able to cancel Wifi Scanning. (r=julienw)

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https://hg.mozilla.org/integration/gaia-central/rev/47f7deea207e
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 889623 - [FTE] need to be able to cancel Wifi Scanning. Adding timeout
Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/218c8b6ad922
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #12986 from brendandahl/pdfjs-0.8.629

Bug 929059 - Update pdf.js to version 0.8.629.

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https://hg.mozilla.org/integration/gaia-central/rev/db54b13503ad
Author: Brendan Dahl <brendan.dahl@gmail.com>
Desc: Bug 929059 - Update pdf.js to version 0.8.629.
Bug 921928 - Make <iframe mozbrower remote> a preferred target when fluffing r=roc

In bug 921928, the user places a call and then tries to do other actions
(calls, SMS, contacts, ...) with actions very close to the attention
screen. When trying to do those other actions, event fluffing is
prioritizing the attention screen rather than user apps.
---
 layout/base/PositionedEventTargeting.cpp           |  10 ++
 layout/base/tests/Makefile.in                      |   2 +
 .../bug921928_event_target_iframe_apps_oop.html    |   8 +
 .../base/tests/test_event_target_iframe_oop.html   | 178 +++++++++++++++++++++
 4 files changed, 198 insertions(+)
 create mode 100644 layout/base/tests/bug921928_event_target_iframe_apps_oop.html
 create mode 100644 layout/base/tests/test_event_target_iframe_oop.html