Do not commit: Revert of r404081 and r402757 for perf testing purposes.

third_party/WebKit/Source/core/layout/LayoutBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutBox.cpp b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
index dc0eb16feb28cd9d168cd7b600fc6ff9aa9c4a82..d83e9b5e26e69234ad63ac9bedf0b87257a45bb3 100644
--- a/third_party/WebKit/Source/core/layout/LayoutBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutBox.cpp
@@ -458,12 +458,12 @@ int LayoutBox::pixelSnappedClientHeight() const
     return snapSizeToPixel(clientHeight(), location().y() + clientTop());
 }
 
-int LayoutBox::pixelSnappedOffsetWidth(const Element*) const
+int LayoutBox::pixelSnappedOffsetWidth() const
 {
     return snapSizeToPixel(offsetWidth(), location().x() + clientLeft());
 }
 
-int LayoutBox::pixelSnappedOffsetHeight(const Element*) const
+int LayoutBox::pixelSnappedOffsetHeight() const
 {
     return snapSizeToPixel(offsetHeight(), location().y() + clientTop());
 }
@@ -4485,14 +4485,14 @@ LayoutRect LayoutBox::visualOverflowRect() const
     return unionRect(m_overflow->selfVisualOverflowRect(), m_overflow->contentsVisualOverflowRect());
 }
 
-LayoutUnit LayoutBox::offsetLeft(const Element* parent) const
+LayoutUnit LayoutBox::offsetLeft() const
 {
-    return adjustedPositionRelativeTo(topLeftLocation(), parent).x();
+    return adjustedPositionRelativeToOffsetParent(topLeftLocation()).x();
 }
 
-LayoutUnit LayoutBox::offsetTop(const Element* parent) const
+LayoutUnit LayoutBox::offsetTop() const
 {
-    return adjustedPositionRelativeTo(topLeftLocation(), parent).y();
+    return adjustedPositionRelativeToOffsetParent(topLeftLocation()).y();
 }
 
 LayoutPoint LayoutBox::flipForWritingModeForChild(const LayoutBox* child, const LayoutPoint& point) const