Make sure we short-circuit the second corruption test, it might be crashing firefox

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 15d17c07aa21f4005c533b22a95a2203c5b06c0b..b581f65c8b827f0d2579d46979f51d5789803cd9 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -40924,8 +40924,7 @@ class _ValidatingTreeSanitizer implements NodeTreeSanitizer {
       // On IE, erratically, the hasCorruptedAttributes test can return false,
       // even though it clearly is corrupted. A separate copy of the test
       // inlining just the basic check seems to help.
-      var corruptedTest2 = Element._hasCorruptedAttributesAdditionalCheck(element);
-      corrupted = corruptedTest1 || corruptedTest2;
+      corrupted = corruptedTest1 ? true : Element._hasCorruptedAttributesAdditionalCheck(element);
     } catch(e) {}
     var elementText = 'element unprintable';
     try {