Move remaining Message functions to C++

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 2a248b7d9134f77e001bdac44d9a7887b6c33214..56a6464597c6b263f7ff83b9c66bb646ebac1da4 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8129,6 +8129,15 @@ class JSMessageObject: public JSObject {
   inline int end_position() const;
   inline void set_end_position(int value);
 
+  int GetLineNumber() const;
+
+  // Returns the offset of the given position within the containing line.
+  int GetColumnNumber() const;
+
+  // Returns the source code line containing the given source
+  // position, or the empty string if the position is invalid.
+  Handle<String> GetSourceLine() const;
+
   DECLARE_CAST(JSMessageObject)
 
   // Dispatched behavior.