Clean up the boolean argument to visibleContentRect

      https://bugs.webkit.org/show_bug.cgi?id=110167

Source/WebCore:

Reviewed by Simon Fraser.

Replace the boolean argument to visibleContentRect() with
an enum.

No behavior change.

* WebCore.exp.in:
* dom/Document.cpp:
(WebCore::Document::viewportSize):
* inspector/InspectorOverlay.cpp:
(WebCore::InspectorOverlay::update):
* page/DOMWindow.cpp:
(WebCore::DOMWindow::innerHeight):
(WebCore::DOMWindow::innerWidth):
* page/FrameView.cpp:
(WebCore::FrameView::calculateScrollbarModesForLayout):
(WebCore::FrameView::layout):
(WebCore::FrameView::performPostLayoutTasks):
(WebCore::FrameView::windowClipRect):
* page/SpatialNavigation.cpp:
(WebCore::canScrollInDirection):
* platform/ScrollView.cpp:
(WebCore::ScrollView::unscaledVisibleContentSize):
(WebCore::ScrollView::visibleContentRect):
(WebCore::ScrollView::layoutSize):
(WebCore::ScrollView::updateScrollbars):
(WebCore::ScrollView::paint):
* platform/ScrollView.h:
* platform/ScrollableArea.cpp:
(WebCore::ScrollableArea::visibleContentRect):
* platform/ScrollableArea.h:
* rendering/RenderDialog.cpp:
(WebCore::RenderDialog::layout):
* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::maximumScrollPosition):
(WebCore::RenderLayer::visibleContentRect):
* rendering/RenderLayer.h:
* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::frameViewDidChangeSize):
(WebCore::RenderLayerCompositor::updateRootLayerPosition):

Source/WebKit/blackberry:

Reviewed by Simon Fraser.

Replace the boolean argument to visibleContentRect() with
an enum.

* Api/WebPage.cpp:
(BlackBerry::WebKit::WebPagePrivate::getRecursiveVisibleWindowRect):
* WebKitSupport/InRegionScrollableArea.cpp:
(BlackBerry::WebKit::InRegionScrollableArea::InRegionScrollableArea):

Source/WebKit/chromium:

Reviewed by Simon Fraser.

Replace the boolean argument to visibleContentRect() with
an enum.

* src/ChromeClientImpl.cpp:
(WebKit::ChromeClientImpl::popupOpened):

Source/WebKit/efl:

Reviewed by Simon