Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderFlowThread.cpp

Index: Source/core/rendering/RenderFlowThread.cpp
diff --git a/Source/core/rendering/RenderFlowThread.cpp b/Source/core/rendering/RenderFlowThread.cpp
index 45d89f4297b9fcfae5ebce73760135d1d5d059a1..4a8e5a135d6e8ccc2933ace20e50de30bebd07de 100644
--- a/Source/core/rendering/RenderFlowThread.cpp
+++ b/Source/core/rendering/RenderFlowThread.cpp
@@ -267,7 +267,7 @@ LayoutRect RenderFlowThread::computeRegionClippingRect(const LayoutPoint& offset
 
 void RenderFlowThread::paintFlowThreadPortionInRegion(PaintInfo& paintInfo, RenderRegion* region, const LayoutRect& flowThreadPortionRect, const LayoutRect& flowThreadPortionOverflowRect, const LayoutPoint& paintOffset) const
 {
-    GraphicsContext* context = paintInfo.context;
+    GraphicsContext* context = paintInfo.getContext();
     if (!context)
         return;
 
@@ -295,17 +295,17 @@ void RenderFlowThread::paintFlowThreadPortionInRegion(PaintInfo& paintInfo, Rend
     IntRect regionClippingRect = pixelSnappedIntRect(computeRegionClippingRect(adjustedPaintOffset + portionLocation, flowThreadPortionRect, flowThreadPortionOverflowRect));
 
     PaintInfo info(paintInfo);
-    info.rect.intersect(regionClippingRect);
+    info.getRect().intersect(regionClippingRect);
 
-    if (!info.rect.isEmpty()) {
+    if (!info.getRect().isEmpty()) {
         context->save();
 
         context->clip(regionClippingRect);
 
         context->translate(adjustedPaintOffset.x(), adjustedPaintOffset.y());
-        info.rect.moveBy(-adjustedPaintOffset);
+        info.getRect().moveBy(-adjustedPaintOffset);
 
-        layer()->paint(context, info.rect, 0, 0, region, RenderLayer::PaintLayerTemporaryClipRects);
+        layer()->paint(context, info.getRect(), 0, 0, region, RenderLayer::PaintLayerTemporaryClipRects);
 
         context->restore();
     }