https://bugs.webkit.org/show_bug.cgi?id=84965

This is needed because HistoryController restores the previous scroll
position during layout (because we don't want an ugly flash of wrongly-
scrolled content).

Patch by Iain Merrick <husky@google.com> on 2012-06-18
Reviewed by Simon Fraser.

Test: compositing/fixed-position-scroll-offset-history-restore.html

* page/FrameView.cpp:
(WebCore::FrameView::updateFixedElementsAfterScrolling):

LayoutTests: Allow updateFixedElementsAfterScrolling() to run during layout.
https://bugs.webkit.org/show_bug.cgi?id=84965

This is needed because HistoryController restores the previous scroll
position during layout (because we don't want an ugly flash of wrongly-
scrolled content).

Patch by Iain Merrick <husky@google.com> on 2012-06-18
Reviewed by Simon Fraser.

* compositing/fixed-position-scroll-offset-history-restore-expected.txt: Added.
* compositing/fixed-position-scroll-offset-history-restore.html: Added.
* compositing/resources/fixed-position-scroll-offset-history-restore-2.html: Added.
* platform/chromium-linux/compositing/fixed-position-scroll-offset-history-restore-expected.png: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@120601 268f45cc-cd09-0410-ab3c-d52691b4dbfc