Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RootInlineBox.cpp

Index: Source/core/rendering/RootInlineBox.cpp
diff --git a/Source/core/rendering/RootInlineBox.cpp b/Source/core/rendering/RootInlineBox.cpp
index bd816bbe7fa20d147856a93e4bb6bba5b2b252bd..b308f5c5d3b46b7b8619c6d6d5d7fc94ec9030a1 100644
--- a/Source/core/rendering/RootInlineBox.cpp
+++ b/Source/core/rendering/RootInlineBox.cpp
@@ -169,7 +169,7 @@ float RootInlineBox::placeEllipsisBox(bool ltr, float blockLeftEdge, float block
 void RootInlineBox::paintEllipsisBox(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom) const
 {
     if (hasEllipsisBox() && paintInfo.shouldPaintWithinRoot(renderer()) && renderer()->style()->visibility() == VISIBLE
-            && paintInfo.phase == PaintPhaseForeground)
+        && paintInfo.getPhase() == PaintPhaseForeground)
         ellipsisBox()->paint(paintInfo, paintOffset, lineTop, lineBottom);
 }
 
@@ -427,7 +427,7 @@ LayoutUnit RootInlineBox::lineSnapAdjustment(LayoutUnit delta) const
 }
 
 GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
-                                         LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo* paintInfo)
+    LayoutUnit selTop, LayoutUnit selHeight, PaintInfo* paintInfo)
 {
     RenderObject::SelectionState lineState = selectionState();
 
@@ -463,7 +463,7 @@ GapRects RootInlineBox::lineSelectionGap(RenderBlock* rootBlock, const LayoutPoi
                 LayoutRect gapRect = rootBlock->logicalRectToPhysicalRect(rootBlockPhysicalPosition, logicalRect);
                 if (isPreviousBoxSelected && gapRect.width() > 0 && gapRect.height() > 0) {
                     if (paintInfo && box->parent()->renderer()->style()->visibility() == VISIBLE)
-                        paintInfo->context->fillRect(gapRect, box->parent()->renderer()->selectionBackgroundColor());
+                        paintInfo->getContext()->fillRect(gapRect, box->parent()->renderer()->selectionBackgroundColor());
                     // VisibleSelection may be non-contiguous, see comment above.
                     result.uniteCenter(gapRect);
                 }