[Mac][WK2] Donât let plug-ins use System V shared memory
        https://bugs.webkit.org/show_bug.cgi?id=113466
        <rdar://problem/13159030>

        Reviewed, tweaked and landed by Alexey Proskuryakov.

        Instead of allowing plug-ins to request System V shm, give them a
        temporary but usable alternative if they try to request it.

        * PluginProcess/mac/PluginProcessShim.mm:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147500 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Unreviewed, rolling out r147423.

The change r147402 was reverted by r147450.
The rebaseline introduced by r147423 needs to be reverted.

* platform/mac-wk2/http/tests/security/XFrameOptions: Removed.
* platform/mac-wk2/http/tests/security/XFrameOptions/x-frame-options-deny-meta-tag-parent-same-origin-deny-expected.txt: Removed.
* platform/mac/http/tests/security/XFrameOptions: Removed.
* platform/mac/http/tests/security/XFrameOptions/x-frame-options-deny-meta-tag-expected.txt: Removed.
* platform/mac/http/tests/security/XFrameOptions/x-frame-options-deny-meta-tag-in-body-expected.txt: Removed.
* platform/mac/http/tests/security/XFrameOptions/x-frame-options-deny-meta-tag-parent-same-origin-deny-expected.txt: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147501 268f45cc-cd09-0410-ab3c-d52691b4dbfc