https://bugs.webkit.org/show_bug.cgi?id=91644
RIM PR 174365

Reviewed by Adam Treat and Antonio Gomes.

We expose suspendScreenAndBackingStoreUpdates() to the
outside API, but also use it internally when reacting
to a number of happenings, i.e. zooming, viewport resize,
resetting view state on Committed state or when restoring
it from previous pages, etc.

These two can clash. For instance, if we get a suspend
call from outside that suspends us for app inactivity,
or we are told to suspend because the main target surface
is not available at the time, and while being suspended
we try to rotate, finish loading a page, the we'll end up
resuming operations even though we shouldn't.

This patch changes the suspend flag to be a counter
instead, allowing nested suspend/resume calls and making
suspend/resume more robust this way. It also changes
several call sites to make sure suspend/resume calls are
paired up correctly.

* Api/BackingStore.cpp:
(BlackBerry::WebKit::BackingStorePrivate::BackingStorePrivate):
(BlackBerry::WebKit::BackingStorePrivate::suspendScreenAndBackingStoreUpdates):
(BlackBerry::WebKit::BackingStorePrivate::resumeScreenAndBackingStoreUpdates):
* Api/BackingStore_p.h:
(BackingStorePrivate):
* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::shouldZoomAboutPoint):
(BlackBerry::WebKit::WebPagePrivate::zoomAboutPointTimerFired):
(BlackBerry::WebKit::WebPagePrivate::blockZoomRectForNode):
* WebCoreSupport/FrameLoaderClientBlackBerry.cpp:
(WebCore::FrameLoaderClientBlackBerry::restoreViewState):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@123129 268f45cc-cd09-0410-ab3c-d52691b4dbfc