Add OVERRIDE where possible in HTMLMediaElement and children

Add OVERRIDE where possible in HTMLMediaElement and children

Some of the places where it wasn't added are in order, but some of
them simply shouldn't be virtual and will be dealt with later.

BUG=313702
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=161068

[Mike West, 2013-10-31 15:01:38]

On 2013/10/31 14:54:50, philipj wrote:

LGTM.

If these methods aren't being overridden by subclasses (e.g. HTMLVideoElement is
the end of the chain), you can/should also add a FINAL annotation to either the
class or methods: see
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/xGwB9YcA5YY.

[Mike West, 2013-10-31 15:11:50]

On 2013/10/31 15:01:38, Mike West wrote:
> On 2013/10/31 14:54:50, philipj wrote:
> 
> LGTM.
> 
> If these methods aren't being overridden by subclasses (e.g. HTMLVideoElement
is
> the end of the chain), you can/should also add a FINAL annotation to either
the
> class or methods: see
>
https://groups.google.com/a/chromium.org/forum/#%21topic/blink-dev/xGwB9YcA5YY.

Er, nevermind. I just noticed that the classes are already FINAL. :)

[commit-bot: I haz the power, 2013-10-31 15:16:01]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/philipj@opera.com/51763009/1

[commit-bot: I haz the power, 2013-10-31 16:42:46]

Change committed as 161068