[BlackBerry] Allow surface resizing for use cases other than rotation.

[BlackBerry] Allow surface resizing for use cases other than rotation.
https://bugs.webkit.org/show_bug.cgi?id=90295
RIM PR 171459

Reviewed by George Staikos.

A new API method setHasPendingSurfaceSizeChange() is
introduced for that effect, and used inside of
setViewportSize() to let the WebPageClient do the
resizing. Methods are renamed to reflect that this
is not exclusively meant for rotation anymore.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::WebPagePrivate):
(BlackBerry::WebKit::WebPage::setScreenOrientation):
(WebKit):
(BlackBerry::WebKit::WebPage::setHasPendingSurfaceSizeChange):
(BlackBerry::WebKit::WebPagePrivate::resizeSurfaceIfNeeded):
(BlackBerry::WebKit::WebPagePrivate::setViewportSize):
* Api/WebPage.h:
* Api/WebPageClient.h:
* Api/WebPage_p.h:
(WebPagePrivate):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121626 268f45cc-cd09-0410-ab3c-d52691b4dbfc