Revert "Revert breaking CL"

tools/dom/src/native_DOMImplementation.dart

Index: tools/dom/src/native_DOMImplementation.dart
diff --git a/tools/dom/src/native_DOMImplementation.dart b/tools/dom/src/native_DOMImplementation.dart
index a5d923b4377dda9a1cc6417ea3369c398e87c9ca..cab500e7d117fe472bfb7573644df3922b00a7e6 100644
--- a/tools/dom/src/native_DOMImplementation.dart
+++ b/tools/dom/src/native_DOMImplementation.dart
@@ -79,6 +79,15 @@ class _Utils {
     return result;
   }
 
+  static List captureParsedStackTrace() {
+    try {
+      // Throwing an exception is the only way to generate a stack trace.
+      throw new Exception();
+    } catch (e, stackTrace) {
+      return parseStackTrace(stackTrace);
+    }
+  }
+
   static void populateMap(Map result, List list) {
     for (int i = 0; i < list.length; i += 2) {
       result[list[i]] = list[i + 1];