Address regression bug report, revert the PaintInfo rect member function.

Source/core/rendering/RenderFrameSet.cpp

Index: Source/core/rendering/RenderFrameSet.cpp
diff --git a/Source/core/rendering/RenderFrameSet.cpp b/Source/core/rendering/RenderFrameSet.cpp
index f0e7fcaa8c28296ddbd0eb905c3bd931806dd2f9..e0a7de79af55d4adffb9f0be02a4800810f56828 100644
--- a/Source/core/rendering/RenderFrameSet.cpp
+++ b/Source/core/rendering/RenderFrameSet.cpp
@@ -78,7 +78,7 @@ static Color borderFillColor()
 
 void RenderFrameSet::paintColumnBorder(const PaintInfo& paintInfo, const IntRect& borderRect)
 {
-    if (!paintInfo.rect().intersects(borderRect))
+    if (!paintInfo.rect.intersects(borderRect))
         return;
 
     // FIXME: We should do something clever when borders from distinct framesets meet at a join.
@@ -97,7 +97,7 @@ void RenderFrameSet::paintColumnBorder(const PaintInfo& paintInfo, const IntRect
 
 void RenderFrameSet::paintRowBorder(const PaintInfo& paintInfo, const IntRect& borderRect)
 {
-    if (!paintInfo.rect().intersects(borderRect))
+    if (!paintInfo.rect.intersects(borderRect))
         return;
 
     // FIXME: We should do something clever when borders from distinct framesets meet at a join.