Added Area Element class doc.

Added Area Element class doc.

Committed: https://code.google.com/p/dart/source/detail?r=18052

[Andrei Mouravski, 2013-02-01 19:21:57]

I added this to demonstrate how this works to Lars, but might as well commit it.

[Kathy Walrath, 2013-02-01 20:58:01]

some quibbles

https://codereview.chromium.org/12163006/diff/2001/sdk/lib/html/dartium/html_...
File sdk/lib/html/dartium/html_dartium.dart (right):

https://codereview.chromium.org/12163006/diff/2001/sdk/lib/html/dartium/html_...
sdk/lib/html/dartium/html_dartium.dart:464: + * * [Area
Element](https://developer.mozilla.org/en-US/docs/HTML/Element/area)

Could we just say [<area>], since the MDN page is called <area>?

[<area>](...) on MDN.

If that doesn't work, maybe:

[Area element documentation](...) on MDN.

I don't remember what preposition we used before, but "from MDN" sounds wrong to
me.

[Andrei Mouravski, 2013-02-01 21:19:39]

PTAL.

[Kathy Walrath, 2013-02-01 21:53:01]

The new text looks good, but I only see it in one file...

[Kathy Walrath, 2013-02-01 21:55:11]

lgtm

Interesting, the changes *are* in the other files, too. There's just no link in
the delta section.

[Andrei Mouravski, 2013-02-04 15:50:47]

On 2013/02/01 21:55:11, Kathy Walrath wrote:
> lgtm
> 
> Interesting, the changes *are* in the other files, too. There's just no link
in
> the delta section.

Yeah, that's because Rietveld (Chromium Code Reviews) can't handle that large a
file. It's awful.

Thanks for review! Submitting.