Support column-based breakpoints in the VM and Observatory.

runtime/observatory/tests/service/deferred_library.dart

 // Copyright (c) 2015, 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.
 
-part of manual_inspector_test;
+library deferred_library;
 
-functionInPart() {
+int value = 0;
 
+int decValue(int amount) {
+  value -= amount;
+  return amount;
 }
 
-set explicitSetter(x) {}
+void deferredTest() {
+  decValue(decValue(1));  // line 15
 
-get explicitGetter {}
-
-
-class D {
-  set explicitSetter(x) {}
-
-  get explicitGetter {}
+  decValue(decValue(1));  // line 17
 }
-