Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/svg/RenderSVGRoot.cpp

Index: Source/core/rendering/svg/RenderSVGRoot.cpp
diff --git a/Source/core/rendering/svg/RenderSVGRoot.cpp b/Source/core/rendering/svg/RenderSVGRoot.cpp
index 0537fbb1afc3585edcb5fe068c2d3787430075f3..32a61e1ad2187be1f9eef58ee2c2dd532d60d438 100644
--- a/Source/core/rendering/svg/RenderSVGRoot.cpp
+++ b/Source/core/rendering/svg/RenderSVGRoot.cpp
@@ -261,7 +261,7 @@ void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paint
         return;
 
     // Don't paint, if the context explicitly disabled it.
-    if (paintInfo.context->paintingDisabled())
+    if (paintInfo.getContext()->paintingDisabled())
         return;
 
     // An empty viewBox also disables rendering.
@@ -279,21 +279,21 @@ void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paint
     if (!firstChild()) {
         SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
         if (!resources || !resources->filter()) {
-            if (page && paintInfo.phase == PaintPhaseForeground)
+            if (page && paintInfo.getPhase() == PaintPhaseForeground)
                 page->addRelevantUnpaintedObject(this, visualOverflowRect());
             return;
         }
     }
 
-    if (page && paintInfo.phase == PaintPhaseForeground)
+    if (page && paintInfo.getPhase() == PaintPhaseForeground)
         page->addRelevantRepaintedObject(this, visualOverflowRect());
 
     // Make a copy of the PaintInfo because applyTransform will modify the damage rect.
     PaintInfo childPaintInfo(paintInfo);
-    childPaintInfo.context->save();
+    childPaintInfo.getContext()->save();
 
     // Apply initial viewport clip - not affected by overflow handling
-    childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset, paintInfo.renderRegion)));
+    childPaintInfo.getContext()->clip(pixelSnappedIntRect(overflowClipRect(paintOffset, paintInfo.getRenderRegion())));
 
     // Convert from container offsets (html renderers) to a relative transform (svg renderers).
     // Transform from our paint container's coordinate system to our local coords.
@@ -305,7 +305,7 @@ void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paint
     {
         SVGRenderingContext renderingContext;
         bool continueRendering = true;
-        if (childPaintInfo.phase == PaintPhaseForeground) {
+        if (childPaintInfo.getPhase() == PaintPhaseForeground) {
             renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
             continueRendering = renderingContext.isRenderingPrepared();
         }
@@ -314,7 +314,7 @@ void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paint
             RenderBox::paint(childPaintInfo, LayoutPoint());
     }
 
-    childPaintInfo.context->restore();
+    childPaintInfo.getContext()->restore();
 }
 
 void RenderSVGRoot::willBeDestroyed()