Revert of Simplify the code in FrameView::updateLayoutAndStyleIfNeededRecursive a little bit. (https://codereview.chromium.org/435793002/)

Reason for revert:
Can cause a use after free if a FrameView is deleted during layout or style update.

Original issue's description:
> Simplify the code in FrameView::updateLayoutAndStyleIfNeededRecursive a little bit.
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=179355

TBR=abarth@chromium.org,esprehn@chromium.org,leviw@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/437253002

git-svn-id: svn://svn.chromium.org/blink/trunk@179480 bbb929c8-8fbe-4397-9dbb-9b2b20218538