Implement interfaces in PaintInfo and make it a class.

Source/core/rendering/RenderListBox.cpp

Index: Source/core/rendering/RenderListBox.cpp
diff --git a/Source/core/rendering/RenderListBox.cpp b/Source/core/rendering/RenderListBox.cpp
index 1771c60935b7dc3bdfcecd4b44dd71b3b1c74ffe..bd620f215a84be025f1459c32585c87b5c8d28bc 100644
--- a/Source/core/rendering/RenderListBox.cpp
+++ b/Source/core/rendering/RenderListBox.cpp
@@ -289,7 +289,7 @@ void RenderListBox::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOf
 
     int listItemsSize = numItems();
 
-    if (paintInfo.phase == PaintPhaseForeground) {
+    if (paintInfo.getPhase() == PaintPhaseForeground) {
         int index = m_indexOffset;
         while (index < listItemsSize && index <= m_indexOffset + numVisibleItems()) {
             paintItemForeground(paintInfo, paintOffset, index);
@@ -300,7 +300,7 @@ void RenderListBox::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOf
     // Paint the children.
     RenderBlock::paintObject(paintInfo, paintOffset);
 
-    switch (paintInfo.phase) {
+    switch (paintInfo.getPhase()) {
     // Depending on whether we have overlay scrollbars they
     // get rendered in the foreground or background phases
     case PaintPhaseForeground:
@@ -359,7 +359,7 @@ void RenderListBox::paintScrollbar(PaintInfo& paintInfo, const LayoutPoint& pain
             m_vBar->width(),
             height() - (borderTop() + borderBottom()));
         m_vBar->setFrameRect(scrollRect);
-        m_vBar->paint(paintInfo.context, paintInfo.rect);
+        m_vBar->paint(paintInfo.getContext(), paintInfo.getRect());
     }
 }
 
@@ -416,7 +416,7 @@ void RenderListBox::paintItemForeground(PaintInfo& paintInfo, const LayoutPoint&
             textColor = theme()->inactiveListBoxSelectionForegroundColor();
     }
 
-    paintInfo.context->setFillColor(textColor);
+    paintInfo.getContext()->setFillColor(textColor);
 
     TextRun textRun(itemText, 0, 0, TextRun::AllowTrailingExpansion, itemStyle->direction(), isOverride(itemStyle->unicodeBidi()), true, TextRun::NoRounding);
     Font itemFont = style()->font();
@@ -433,7 +433,7 @@ void RenderListBox::paintItemForeground(PaintInfo& paintInfo, const LayoutPoint&
     // Draw the item text
     TextRunPaintInfo textRunPaintInfo(textRun);
     textRunPaintInfo.bounds = r;
-    paintInfo.context->drawBidiText(itemFont, textRunPaintInfo, roundedIntPoint(r.location()));
+    paintInfo.getContext()->drawBidiText(itemFont, textRunPaintInfo, roundedIntPoint(r.location()));
 }
 
 void RenderListBox::paintItemBackground(PaintInfo& paintInfo, const LayoutPoint& paintOffset, int listIndex)
@@ -455,7 +455,7 @@ void RenderListBox::paintItemBackground(PaintInfo& paintInfo, const LayoutPoint&
     if (!element->renderStyle() || element->renderStyle()->visibility() != HIDDEN) {
         LayoutRect itemRect = itemBoundingBoxRect(paintOffset, listIndex);
         itemRect.intersect(controlClipRect(paintOffset));
-        paintInfo.context->fillRect(pixelSnappedIntRect(itemRect), backColor);
+        paintInfo.getContext()->fillRect(pixelSnappedIntRect(itemRect), backColor);
     }
 }