Revert of Remove webkitConvertPointFromPageToNode() and webkitConvertPointFromNodeToPage()

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 86b776ca6635bcd78088e9361e474924b4363aff..c39749c92fe4309f9236f2b6f0079aaf7b000647 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -1602,6 +1602,34 @@ unsigned short Node::compareDocumentPosition(const Node* otherNode, ShadowTreesT
                DOCUMENT_POSITION_PRECEDING | DOCUMENT_POSITION_CONTAINS | connection;
 }
 
+FloatPoint Node::convertToPage(const FloatPoint& p) const
+{
+    // If there is a renderer, just ask it to do the conversion
+    if (renderer())
+        return renderer()->localToAbsolute(p, UseTransforms);
+
+    // Otherwise go up the tree looking for a renderer
+    if (Element* parent = parentElement())
+        return parent->convertToPage(p);
+
+    // No parent - no conversion needed
+    return p;
+}
+
+FloatPoint Node::convertFromPage(const FloatPoint& p) const
+{
+    // If there is a renderer, just ask it to do the conversion
+    if (renderer())
+        return renderer()->absoluteToLocal(p, UseTransforms);
+
+    // Otherwise go up the tree looking for a renderer
+    if (Element* parent = parentElement())
+        return parent->convertFromPage(p);
+
+    // No parent - no conversion needed
+    return p;
+}
+
 String Node::debugName() const
 {
     StringBuilder name;