Add getters for column number and script id to v8::Function

src/handles.cc

Index: src/handles.cc
===================================================================
--- src/handles.cc	(revision 9927)
+++ src/handles.cc	(working copy)
@@ -662,7 +662,20 @@
   return right + script->line_offset()->value();
 }
 
+// Convert code position into column number.
+int GetScriptColumnNumber(Handle<Script> script, int code_pos) {
+  int line_number = GetScriptLineNumber(script, code_pos);
+  if (line_number == -1) return -1;
 
+  AssertNoAllocation no_allocation;
+  FixedArray* line_ends_array = FixedArray::cast(script->line_ends());
+  line_number = line_number - script->line_offset()->value();
+  if (line_number == 0) return code_pos + script->column_offset()->value();
+  int prev_line_end_pos =
+      Smi::cast(line_ends_array->get(line_number - 1))->value();
+  return code_pos - (prev_line_end_pos + 1);
+}
+
 int GetScriptLineNumberSafe(Handle<Script> script, int code_pos) {
   AssertNoAllocation no_allocation;
   if (!script->line_ends()->IsUndefined()) {