REGRESSION(r134817): Broke iframes and causing tons of crashes on ClusterFuzz (Requested by inferno-sec on #webkit).

[WebKit Review Bot]

http://trac.webkit.org/changeset/134817 broke the build:
Broke iframes and causing tons of crashes on ClusterFuzz (Requested by inferno-sec on #webkit).

This is an automatic bug report generated by the sheriff-bot. If this bug
report was created because of a flaky test, please file a bug for the flaky
test (if we don't already have one on file) and dup this bug against that bug
so that we can track how often these flaky tests case pain.

"Only you can prevent forest fires." -- Smokey the Bear

[WebKit Review Bot]

Created attachment 174792 [details]
ROLLOUT of r134817

Any committer can land this patch automatically by marking it commit-queue+.  The commit-queue will build and test the patch before landing to ensure that the rollout will be successful.  This process takes approximately 15 minutes.

If you would like to land the rollout faster, you can use the following command:

  webkit-patch land-attachment ATTACHMENT_ID

where ATTACHMENT_ID is the ID of this attachment.

[Elliott Sprehn]

Note that iframes still work properly, the issue is malformed HTML and adoption agency algorithm which moves the frame around without unloading it first. This is because ContainerNode::parserRemoveChild doesn't do frame disconnection.

We should override HTMLFrameOwnerElement::removedFrom() to walk up the tree and decrement the counters if the contentFrame() is still set.

[Abhishek Arya]

Comment on attachment 174792 [details]
ROLLOUT of r134817

Elliot knows the patch to fix this and plans to put it up Monday.

[WebKit Review Bot]

Comment on attachment 174792 [details]
ROLLOUT of r134817

Clearing flags on attachment: 174792

Committed r135030: <http://trac.webkit.org/changeset/135030>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.