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 f6c9e499177f8aede91d38478ab22dc78ab85b98..e650c6fd0c5c0aef41f0256b35e434d6420ea27e 100644
--- a/tools/dom/src/native_DOMImplementation.dart
+++ b/tools/dom/src/native_DOMImplementation.dart
@@ -79,15 +79,6 @@ 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];