Enable a srcset 0x descriptor

Enable a srcset 0x descriptor

According to recent spec changes, a "0x" descriptor should be correctly parsed,
and imply intrinsic dimensions of infinity to the image.
This CL enables that, and tests that intrinsic dimensions are impacted accordingly.

BUG=378252
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175196

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175360

[eseidel, 2014-05-28 22:27:42]

lgtm

[commit-bot: I haz the power, 2014-05-28 22:27:55]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/1

[commit-bot: I haz the power, 2014-05-28 23:57:46]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9549)

[commit-bot: I haz the power, 2014-05-29 01:01:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-29 01:01:59]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9562)

[pdr., 2014-05-29 01:15:37]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-05-29 01:16:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/1

[commit-bot: I haz the power, 2014-05-29 02:23:56]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9572)

[commit-bot: I haz the power, 2014-05-29 03:14:25]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-05-29 03:14:25]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9572)

[Yoav Weiss, 2014-05-29 04:36:05]

On 2014/05/29 03:14:25, I haz the power (commit-bot) wrote:
> Try jobs failed on following builders:
>   win_blink_rel on tryserver.blink
>
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9572)

Hmm. On the Windows bot, it seems like the infinite size image test is displayed
with a 0 width,rather than an infinite one. :/
I'll try to look into that.

[Yoav Weiss, 2014-05-30 09:05:46]

The CQ bit was checked by yoav@yoav.ws

[commit-bot: I haz the power, 2014-05-30 09:06:31]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/20001

[Yoav Weiss, 2014-05-30 09:09:39]

The CQ bit was unchecked by yoav@yoav.ws

[Yoav Weiss, 2014-05-30 15:20:11]

I've fixed a freshly committed, related bug. (float was clamped to an int)
I've also split the 0x test into a new layout test file, and added a
TestExpectations line for it.
Filed a bug regarding Windows and infinite intrinsic sizing images at
https://code.google.com/p/chromium/issues/detail?id=379155.

[Yoav Weiss, 2014-05-30 15:44:55]

The CQ bit was checked by yoav@yoav.ws

[commit-bot: I haz the power, 2014-05-30 15:45:39]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/40001

[Yoav Weiss, 2014-05-30 16:17:24]

The CQ bit was unchecked by yoav@yoav.ws

[Yoav Weiss, 2014-05-31 05:00:12]

The CQ bit was checked by yoav@yoav.ws

[commit-bot: I haz the power, 2014-05-31 05:00:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/80001

[commit-bot: I haz the power, 2014-05-31 06:46:04]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  blink_presubmit on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/blink_presubmit/builds/6587)
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)

[Yoav Weiss, 2014-05-31 07:13:07]

The CQ bit was unchecked by yoav@yoav.ws

[Yoav Weiss, 2014-05-31 08:41:35]

The CQ bit was checked by yoav@yoav.ws

[commit-bot: I haz the power, 2014-05-31 08:41:43]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/100001

[commit-bot: I haz the power, 2014-05-31 09:52:17]

Change committed as 175196

[Yoav Weiss, 2014-05-31 10:55:38]

A revert of this CL has been created in
https://codereview.chromium.org/302083009/ by yoav@yoav.ws.

The reason for reverting is: This patch closed the tree with a '"update" on
"Win7 Tests"' message. Reverting.

[Yoav Weiss, 2014-06-03 10:59:28]

The CQ bit was checked by yoav@yoav.ws

[commit-bot: I haz the power, 2014-06-03 10:59:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/yoav@yoav.ws/305643006/120001

[commit-bot: I haz the power, 2014-06-03 11:15:59]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)

[commit-bot: I haz the power, 2014-06-03 12:32:50]

Change committed as 175360