Remove unnecessary sync style recalc for fullscreen.
Remove unnecessary sync style recalc for fullscreen.

There is no code nearby that depends on an up-to-date render tree. The
render tree will now be updated as part of WillBeginMainFrame. I've not
been able to construct a test case that can hook into the code between
the removed call and the new place since the webkitfullscreenchange event
code is called after WillBeginMainFrame.

R=jchaffraix@chromium.org
TEST=fullscreen/
TEST=media/

Review URL: https://codereview.chromium.org/816953002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@187544 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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