Revert of Remove webkitConvertPointFromPageToNode() and webkitConvertPointFromNodeToPage()

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index 43d17eec3b5ea77ed86722e1ae0d5be48aef36d8..a6ec7bf67faec3f66504e0c168c30813b53dea8a 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -486,6 +486,10 @@ public:
     // Whether or not a selection can be started in this object
     virtual bool canStartSelection() const;
 
+    // Getting points into and out of screen space
+    FloatPoint convertToPage(const FloatPoint&) const;
+    FloatPoint convertFromPage(const FloatPoint&) const;
+
     // -----------------------------------------------------------------------------
     // Integration with rendering tree