Use tokenPos instead of line/col in the vm service.

runtime/vm/debugger.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/debugger.h"
 
 #include "include/dart_api.h"
 
 #include "vm/code_generator.h"
 #include "vm/code_patcher.h"
@@ skipping 692 matching lines @@
   intptr_t len =
       OS::SNPrint(NULL, 0, kFormat, func_name, url.ToCString(), line);
   len++;  // String terminator.
   char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
   OS::SNPrint(chars, len, kFormat, func_name, url.ToCString(), line);
   return chars;
 }
 
 
 void ActivationFrame::PrintToJSONObject(JSONObject* jsobj) {
-  intptr_t line = LineNumber();
   const Script& script = Script::Handle(SourceScript());
-
   jsobj->AddProperty("script", script);
-  jsobj->AddProperty("line", line);
-  jsobj->AddProperty("col", ColumnNumber());
+  jsobj->AddProperty("tokenPos", TokenPos());
   jsobj->AddProperty("function", function());
   jsobj->AddProperty("code", code());
-
-  // TODO(turnidge): Consider dropping lineString from the frame.
-  String& line_string = String::Handle(script.GetLine(line));
-  jsobj->AddProperty("lineString", line_string.ToCString());
   {
     JSONArray jsvars(jsobj, "vars");
     const int num_vars = NumLocalVariables();
     for (intptr_t v = 0; v < num_vars; v++) {
       JSONObject jsvar(&jsvars);
       String& var_name = String::Handle();
       Instance& var_value = Instance::Handle();
       intptr_t unused;
       VariableAt(v, &var_name, &unused, &unused, &var_value);
       jsvar.AddProperty("name", var_name.ToCString());
@@ skipping 1586 matching lines @@
 }
 
 
 void Debugger::RegisterCodeBreakpoint(CodeBreakpoint* bpt) {
   ASSERT(bpt->next() == NULL);
   bpt->set_next(code_breakpoints_);
   code_breakpoints_ = bpt;
 }
 
 }  // namespace dart