Keep a RefPtr<SerializedScriptValue*> when we call serialize()/deserialize() in PopStateEvent

If you use a raw SerializedScriptValue* for serialize()/deserialize(), it can potentially cause a use-after-free. This is because serialize()/deserialize() can destruct a RefPtr of the SerializedScriptValue*, depending on data that is serialized/deserialized. So we should keep a RefPtr<SerializedScriptValue*> when we call serialize()/deserialize(). (See https://bugs.webkit.org/show_bug.cgi?id=107792 for more details.)

Created an attachment (id=184645) [details]
Patch

(From update of attachment 184645 [details])
Rejecting attachment 184645 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=queues.webkit.org', '--bot-id=gce-cq-03', 'apply-attachment', '--no-update', '--non-interactive', 184645, '--port=chromium-xvfb']" exit_code: 2 cwd: /mnt/git/webkit-commit-queue

Last 500 characters of output:
webkit-commit-queue

Parsed 4 diffs from patch file(s).
patch: **** Can't create file /tmp/ppZyipMf : No space left on device
patch: **** Can't create file /tmp/ppR1IG0f : No space left on device
patch: **** Can't create file /tmp/pp3cp2Ng : No space left on device
patch: **** Can't create file /tmp/ppqaQytg : No space left on device

Failed to run "[u'/mnt/git/webkit-commit-queue/Tools/Scripts/svn-apply', '--force', '--reviewer', 'Abhishek Arya']" exit_code: 2 cwd: /mnt/git/webkit-commit-queue

Full output: http://queues.webkit.org/results/16122087

(From update of attachment 184645 [details])
Clearing flags on attachment: 184645

Committed r140886: <http://trac.webkit.org/changeset/140886>

All reviewed patches have been landed.  Closing bug.

(From update of attachment 184645 [details])
View in context: https://bugs.webkit.org/attachment.cgi?id=184645&action=review

> Source/WebCore/page/History.cpp:80
> -bool History::isSameAsCurrentState(SerializedScriptValue* state) const
> +bool History::isSameAsCurrentState(PassRefPtr<SerializedScriptValue> state) const

This change makes no sense and does no good. The other half of the change would have been sufficient, although you’d have to add a get() at some call sites. There is no reason for this function to take a PassRefPtr, which implies that it takes ownership of its argument. Please roll this part of the change out.

Reopening to attach new patch.

Created an attachment (id=185398) [details]
Patch

(From update of attachment 184645 [details])
View in context: https://bugs.webkit.org/attachment.cgi?id=184645&action=review

>> Source/WebCore/page/History.cpp:80
>> +bool History::isSameAsCurrentState(PassRefPtr<SerializedScriptValue> state) const
> 
> This change makes no sense and does no good. The other half of the change would have been sufficient, although you’d have to add a get() at some call sites. There is no reason for this function to take a PassRefPtr, which implies that it takes ownership of its argument. Please roll this part of the change out.

Thanks, uploaded a patch for fix.

(From update of attachment 185398 [details])
Clearing flags on attachment: 185398

Committed r141315: <http://trac.webkit.org/changeset/141315>

All reviewed patches have been landed.  Closing bug.