Remove some unused includes from core/css and core/dom

Remove some unused includes from core/css and core/dom

Splitting up codereview.chromium.org/15447002 into smaller patches.

BUG=242216
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=150748

[pdr., 2013-05-21 05:47:25]

On 2013/05/21 05:30:36, Timothy Loh wrote:

rs=me, LGTM

[commit-bot: I haz the power, 2013-05-21 05:48:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/timloh@chromium.org/15387004/1

[eseidel, 2013-05-21 06:05:42]

Did we decide this made the build faster and thus was worth it?

[eseidel, 2013-05-21 06:07:04]

Landing these will make it harder to land changes which remove includes from
headers, no?

[pdr., 2013-05-21 06:10:04]

On 2013/05/21 06:07:04, eseidel wrote:
> Landing these will make it harder to land changes which remove includes from
> headers, no?

This change was made using iwyu and only removes the includes that were actually
not used.

[Timothy Loh, 2013-05-21 06:12:30]

> Did we decide this made the build faster and thus was worth it?

The patch codereview.chromium.org/15447002 made builds about 2% faster. So this
patch will do a fraction of that, but there shouldn't be any downsides to this
(the included headers should be actually unused).

[commit-bot: I haz the power, 2013-05-21 06:33:51]

List of reviewers changed. eseidel@chromium.org did a drive-by without LGTM'ing!

[eseidel, 2013-05-21 06:39:30]

lgtm

[commit-bot: I haz the power, 2013-05-21 06:41:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/timloh@chromium.org/15387004/1

[commit-bot: I haz the power, 2013-05-21 06:42:45]

Change committed as 150748