Fix the conditions when fullscreen detector listeners are registered

Fix the conditions when fullscreen detector listeners are registered

Previously, we rely on the DOMNode[Inserted/Removed]IntoDocument events
to attach/detach the detector. However this won't work if the video
element is created from the parsing process. This CL fixes the issue by
overriding insertedInto() and removedFrom() callbacks, which always
works regardless of how the video element is inserted into the document.

BUG=703210
Review-Url: https://codereview.chromium.org/2758233003
Cr-Commit-Position: refs/heads/master@{#458147}
(cherry picked from commit d9d39e2308b617bad51c86f9703828a2fbef95d8)

Review-Url: https://codereview.chromium.org/2767763002 .
Cr-Commit-Position: refs/branch-heads/3029@{#343}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/8ac66c6ce3966669bb2f3db5bd7a454a96ff4c0c

[Zhiqiang Zhang (Slow), 2017-03-21 21:16:36]

Description was changed from

==========
Fix the conditions when fullscreen detector listeners are registered

Previously, we rely on the DOMNode[Inserted/Removed]IntoDocument events
to attach/detach the detector. However this won't work if the video
element is created from the parsing process. This CL fixes the issue by
overriding insertedInto() and removedFrom() callbacks, which always
works regardless of how the video element is inserted into the document.

BUG=703210

Review-Url: https://codereview.chromium.org/2758233003
Cr-Commit-Position: refs/heads/master@{#458147}
(cherry picked from commit d9d39e2308b617bad51c86f9703828a2fbef95d8)
==========

to

==========
Fix the conditions when fullscreen detector listeners are registered

Previously, we rely on the DOMNode[Inserted/Removed]IntoDocument events
to attach/detach the detector. However this won't work if the video
element is created from the parsing process. This CL fixes the issue by
overriding insertedInto() and removedFrom() callbacks, which always
works regardless of how the video element is inserted into the document.

BUG=703210

Review-Url: https://codereview.chromium.org/2758233003
Cr-Commit-Position: refs/heads/master@{#458147}
(cherry picked from commit d9d39e2308b617bad51c86f9703828a2fbef95d8)

Review-Url: https://codereview.chromium.org/2767763002 .
Cr-Commit-Position: refs/branch-heads/3029@{#343}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/8ac66c6ce3966669bb2f3db5bd7a...
==========

[Zhiqiang Zhang (Slow), 2017-03-21 21:16:37]

Committed patchset #1 (id:1) manually as
8ac66c6ce3966669bb2f3db5bd7a454a96ff4c0c.