Revert of Set proper referrer for css resource fetching

Revert of Set proper referrer for css resource fetching (https://codereview.chromium.org/239353007/)

Reason for revert:
Caused regression

Original issue's description:
> Set proper referrer for css resource fetching
> 
> Fetching css resources are initiated as follows:
>   - Create FetchRequest
>   - Call ResourceFetcher::fetchXXX()
> 
> git-grep shows me that CSSImageValue, CSSImageSetValue and
> CSSFontFaceSrcValue are all of the resource fetch initiators
> which live in css/. I think that setting referrer in these
> classes should cover all css resource fetching.
> 
> Since resource fetching is delayed until the resource is actually
> needed, we need to hold the referrer somewhere.
> This CL modifies the css parser to set referrer to corresponding
> CSSValue (CSSImageValue and CSSFontFaceSrcValue) when it sees url(...).
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=172433

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175004

[bashi, 2014-05-28 12:07:56]

Created Revert of Set proper referrer for css resource fetching

[commit-bot: I haz the power, 2014-05-28 12:08:16]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/bashi@chromium.org/304603006/1

[commit-bot: I haz the power, 2014-05-28 12:08:17]

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

[commit-bot: I haz the power, 2014-05-28 12:08:17]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[jochen (gone - plz use gerrit), 2014-05-28 12:22:40]

lgtm

[bashi, 2014-05-28 12:23:51]

The CQ bit was checked by bashi@chromium.org

[commit-bot: I haz the power, 2014-05-28 12:24:47]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/bashi@chromium.org/304603006/1

[commit-bot: I haz the power, 2014-05-28 13:45:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9452)

[commit-bot: I haz the power, 2014-05-28 14:40:28]

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

[commit-bot: I haz the power, 2014-05-28 14:40:28]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/9463)

[bashi, 2014-05-28 21:57:24]

The CQ bit was checked by bashi@chromium.org

[commit-bot: I haz the power, 2014-05-28 21:57:40]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/bashi@chromium.org/304603006/1

[commit-bot: I haz the power, 2014-05-28 22:51:00]

Change committed as 175004