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

Source/core/rendering/RenderWidget.cpp

Index: Source/core/rendering/RenderWidget.cpp
diff --git a/Source/core/rendering/RenderWidget.cpp b/Source/core/rendering/RenderWidget.cpp
index 9c6feb292d8547d63e6b7d3e2a8719d850c531ff..f8572e6f9b0da6d31d3a21481b4895be559763bb 100644
--- a/Source/core/rendering/RenderWidget.cpp
+++ b/Source/core/rendering/RenderWidget.cpp
@@ -229,7 +229,7 @@ void RenderWidget::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintO
     IntPoint widgetLocation = m_widget->frameRect().location();
     IntPoint paintLocation(roundToInt(adjustedPaintOffset.x() + borderLeft() + paddingLeft()),
         roundToInt(adjustedPaintOffset.y() + borderTop() + paddingTop()));
-    IntRect paintRect = paintInfo.rect();
+    IntRect paintRect = paintInfo.rect;
 
     IntSize widgetPaintOffset = paintLocation - widgetLocation;
     // When painting widgets into compositing layers, tx and ty are relative to the enclosing compositing layer,
@@ -302,7 +302,7 @@ void RenderWidget::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
     }
 
     if (hasLayer() && layer()->canResize())
-        layer()->paintResizer(paintInfo.context, roundedIntPoint(adjustedPaintOffset), paintInfo.rect());
+        layer()->paintResizer(paintInfo.context, roundedIntPoint(adjustedPaintOffset), paintInfo.rect);
 }
 
 void RenderWidget::setIsOverlapped(bool isOverlapped)