https://bugs.webkit.org/show_bug.cgi?id=78054

Reviewed by Eric Seidel.

This patch introduces a pixelSnappedIntRect method that will snap a sub-pixel LayoutRect to
pixel boundaries. These pixel snapped forms are what is used to communicate with the graphics
engine (to paint at whole pixel boundaries) and the embedding app (so they don't need to 
understand we're using sub-pixel units).

No new tests. No change in behavior.

* accessibility/AccessibilityRenderObject.cpp:
(WebCore::AccessibilityRenderObject::isOffScreen):
(WebCore::AccessibilityRenderObject::boundsForVisiblePositionRange):
* dom/Range.cpp:
(WebCore::Range::boundingBox):
* html/HTMLCanvasElement.cpp:
(WebCore::HTMLCanvasElement::paint):
* html/shadow/TextControlInnerElements.cpp:
(WebCore::InputFieldSpeechButtonElement::startSpeechInput):
* page/Frame.cpp:
(WebCore::Frame::nodeImage):
* page/FrameView.cpp:
(WebCore::FrameView::repaintContentRectangle):
(WebCore::FrameView::doDeferredRepaints):
(WebCore::FrameView::windowClipRectForLayer):
* platform/graphics/GraphicsLayer.cpp:
(WebCore::GraphicsLayer::paintGraphicsLayerContents):
* rendering/InlineFlowBox.cpp:
(WebCore::InlineFlowBox::paint):
* rendering/LayoutTypes.h:
(WebCore::pixelSnappedIntRect):
(WebCore):
* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::paintColumnContents):
(WebCore::RenderBlock::selectionGaps):
* rendering/RenderBox.cpp:
(WebCore::RenderBox::paintBoxDecorations):
(WebCore::RenderBox::pushContentsClip):
* rendering/RenderBoxModelObject.cpp:
(WebCore::RenderBoxModelObject::paintFillLayerExtended):
(WebCore::RenderBoxModelObject::calculateBackgroundImageGeometry):
(WebCore::RenderBoxModelObject::drawBoxSideFromPath):
(WebCore::RenderBoxModelObject::paintBoxShadow):
* rendering/RenderDetailsMarker.cpp:
(WebCore::RenderDetailsMarker::paint):
* rendering/RenderFlowThread.cpp:
(WebCore::RenderFlowThread::paintIntoRegion):
* rendering/RenderFrameSet.cpp:
(WebCore::RenderFrameSet::paintColumnBorder):
(WebCore::RenderFrameSet::paintRowBorder):
(WebCore::RenderFrameSet::positionFramesWithFlattening):
* rendering/RenderImage.cpp:
(WebCore::RenderImage::paintReplaced):
* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::scrollRectToVisible):
(WebCore::RenderLayer::positionOverflowControls):
(WebCore::RenderLayer::calculateRects):
* rendering/RenderLayerBacking.cpp:
(WebCore::RenderLayerBacking::updateGraphicsLayerGeometry):
(WebCore::paintScrollbar):
* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::calculateCompositedBounds):
* rendering/RenderObject.cpp:
(WebCore::RenderObject::drawLineForBoxSide):
(WebCore::RenderObject::addPDFURLRect):
* rendering/RenderTextControlSingleLine.cpp:
(WebCore::RenderTextControlSingleLine::showPopup):
(WebCore::RenderTextControlSingleLine::paint):
* rendering/RenderWidget.cpp:
(WebCore::RenderWidget::paint):
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::getRoundedBorderFor):
(WebCore::RenderStyle::getRoundedInnerBorderFor):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@107461 268f45cc-cd09-0410-ab3c-d52691b4dbfc