https://bugs.webkit.org/show_bug.cgi?id=86756

Reviewed by George Staikos.

PR 156710
On high DPI devices, the virtual viewport size of this page was smaller
than screen size. During the refreshing of the page, we reset the scale
when the state was Committed, then layouted and rendered contents based
on the virtual viewport size and default scale 1, which caused a small
size thumbnail before we restored the previous view state.
Fixed it by keeping the previous scale, user scalable and
m_userViewportArguments during the Committed state of refreshing.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::setLoadState):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@117511 268f45cc-cd09-0410-ab3c-d52691b4dbfc