Positioned <legend> element should honor width: auto

Positioned <legend> element should honor width: auto

BUG=336176
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166856

[pals, 2014-02-06 12:06:11]

This bug was introduced while fixing crbug.com/281380. It was review here
https://codereview.chromium.org/24360004/. I fixed this issue based on this
comment
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit....
Now the behavior for <legend> not matching with FF and IE if it is absolutely
positioned. So, this CL makes behavior to match FF and IE. Please review.

[ojan, 2014-02-08 00:12:41]

The C++ side is fine. Just need to fix up the test.

https://codereview.chromium.org/156623004/diff/1/LayoutTests/platform/linux/f...
File
LayoutTests/platform/linux/fast/forms/legend-absolute-position-auto-width-expected.txt
(right):

https://codereview.chromium.org/156623004/diff/1/LayoutTests/platform/linux/f...
LayoutTests/platform/linux/fast/forms/legend-absolute-position-auto-width-expected.txt:1:
layer at (0,0) size 800x600
This is a new test? Did you forget to include the test itself?

Also, it'd be better if you could make this a reftest or a check-layout test so
that we don't need the platform-specific png files.

[pals, 2014-02-10 07:08:03]

Added the layout test file. Please review.

https://codereview.chromium.org/156623004/diff/1/LayoutTests/platform/linux/f...
File
LayoutTests/platform/linux/fast/forms/legend-absolute-position-auto-width-expected.txt
(right):

https://codereview.chromium.org/156623004/diff/1/LayoutTests/platform/linux/f...
LayoutTests/platform/linux/fast/forms/legend-absolute-position-auto-width-expected.txt:1:
layer at (0,0) size 800x600
On 2014/02/08 00:12:42, ojan wrote:
> This is a new test? Did you forget to include the test itself?
> 
> Also, it'd be better if you could make this a reftest or a check-layout test
so
> that we don't need the platform-specific png files.

Done. Converted to a js layout test and added the layout test file.

[ojan, 2014-02-10 18:36:39]

lgtm

[commit-bot: I haz the power, 2014-02-10 18:36:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sanjoy.pal@samsung.com/156623004/100001

[commit-bot: I haz the power, 2014-02-10 20:18:07]

Change committed as 166856