Rename FullscreenElementStack to just Fullscreen

Rename FullscreenElementStack to just Fullscreen

This class does more than just manage the fullscreen element stack, and
the shorter name makes the code more readable in many places. In the
renamed Fullscreen class, it also makes it more obvious when the actual
fullscreen element stack is being manipulated.

BUG=383813
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180433

[philipj_slow, 2014-08-15 20:47:53]

PTAL. This will obviously conflict with my other changes, but if you like the
rename I'll resolve the conflicts and land at a convenient time.

[philipj_slow, 2014-08-15 22:08:13]

rebase

[philipj_slow, 2014-08-16 21:08:05]

falken, on this and other fullscreen reviews, if it lgty but that's not enough
to land, it would be great if you could also add tkent or whoever has the power
for what remains. (jochen is in my timezone but OOO for a while.)

[falken, 2014-08-18 02:17:23]

On 2014/08/16 21:08:05, philipj wrote:
> falken, on this and other fullscreen reviews, if it lgty but that's not enough
> to land, it would be great if you could also add tkent or whoever has the
power
> for what remains. (jochen is in my timezone but OOO for a while.)

Sure. Let me know if you'd like me to CQ something as well. In WebKit days we'd
say "cq?" to request CQ.

[falken, 2014-08-18 03:15:25]

lgtm

abarth: can you review as Source/web OWNER
trchen: FYI

[abarth-chromium, 2014-08-18 04:26:54]

Source/web LGTM

[philipj_slow, 2014-08-18 07:18:41]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2014-08-18 07:19:43]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/philipj@opera.com/476763004/20001

[commit-bot: I haz the power, 2014-08-18 07:55:07]

Committed patchset #2 (20001) as 180433

[philipj_slow, 2014-08-18 08:18:37]

On 2014/08/18 02:17:23, falken wrote:
> On 2014/08/16 21:08:05, philipj wrote:
> > falken, on this and other fullscreen reviews, if it lgty but that's not
enough
> > to land, it would be great if you could also add tkent or whoever has the
> power
> > for what remains. (jochen is in my timezone but OOO for a while.)
> 
> Sure. Let me know if you'd like me to CQ something as well. In WebKit days
we'd
> say "cq?" to request CQ.

That sounds great, I'll request it where it makes sense going forward.