Move paint invalidation up into HTMLMediaElement::clearMediaPlayer().

Move paint invalidation up into HTMLMediaElement::clearMediaPlayer().

To avoid (Oilpan) finalization order issues, reposition r197301's paint
invalidation of media elements. Instead of triggering it as part of the
destruction of the media element's media player client object, have the
media element handle it on its own while initiating the destruction of
the media player (and more) in clearMediaPlayer(). A simpler arrangement.

R=haraken,chrishtr
BUG=497614
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=197395

[sof, 2015-06-18 18:41:57]

sigbjornf@opera.com changed reviewers:
+ chrishtr@chromium.org, oilpan-reviews@chromium.org

[sof, 2015-06-18 18:41:58]

please take a look.

[haraken, 2015-06-18 18:45:24]

haraken@chromium.org changed reviewers:
+ haraken@chromium.org

[haraken, 2015-06-18 18:45:24]

LGTM, but I want to have Chris take another look.

[chrishtr, 2015-06-18 18:54:57]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2015-06-18 18:54:58]

lgtm

[commit-bot: I haz the power, 2015-06-18 18:55:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1186853004/1

[commit-bot: I haz the power, 2015-06-18 20:44:32]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=197395