Allow lax MIME type parsing for same-origin CSS in quirks mode.

Allow lax MIME type parsing for same-origin CSS in quirks mode.

The change in [1] is too strict for the web, and doesn't match Firefox
or IE's behavior. In particular, it does not respect the same-origin
carveout that the HTML spec specifies[2].

This patch corrects that oversight.

[1]: https://chromium.googlesource.com/chromium/blink/+/80f95a77030f72e9502f52873eeb4490c4b3f458
[2]: https://html.spec.whatwg.org/multipage/semantics.html#link-type-stylesheet

BUG=495711
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196678

[Mike West, 2015-06-08 13:04:00]

mkwst@chromium.org changed reviewers:
+ jochen@chromium.org, yoav@yoav.ws

[Mike West, 2015-06-08 13:04:00]

Yoav, Jochen: would one of you mind taking a look at this patch?

-mike

[jochen (gone - plz use gerrit), 2015-06-08 13:35:46]

lgtm with comment

https://codereview.chromium.org/1169713004/diff/1/Source/core/fetch/CSSStyleS...
File Source/core/fetch/CSSStyleSheetResource.h (right):

https://codereview.chromium.org/1169713004/diff/1/Source/core/fetch/CSSStyleS...
Source/core/fetch/CSSStyleSheetResource.h:41: enum MIMETypeCheck {
how about an enum class here?

[Mike West, 2015-06-08 14:30:37]

Fixed, as suggested. Also removed http/tests/misc/css-accept-any-type.html,
which is entirely redundant with the tests added in this patch.

[Mike West, 2015-06-08 14:30:42]

The CQ bit was checked by mkwst@chromium.org

[Mike West, 2015-06-08 14:30:42]

The patchset sent to the CQ was uploaded after l-g-t-m from jochen@chromium.org
Link to the patchset: https://codereview.chromium.org/1169713004/#ps20001
(title: "Comment.")

[commit-bot: I haz the power, 2015-06-08 14:31:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1169713004/20001

[commit-bot: I haz the power, 2015-06-08 15:49:02]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196678