Add "Symbol" to the list of expected global constructors

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 8c671a3d3506ad9d855f6bedae5af3b6760a7168..de0857da9139581ba7683ba0c5a7cdc290c487ff 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -1839,6 +1839,15 @@ crbug.com/399459 http/tests/misc/link-rel-prefetch-and-subresource.html [ Pass F
 # V8 3.28.19
 crbug.com/392762 fast/js/nested-object-gc.html [ Pass Crash ]
 
+# After the V8 roll containing https://code.google.com/p/v8/source/detail?r=22831 lands,
+# these should start passing and these expectations can be removed.
+crbug.com/400507 virtual/stable/webexposed/global-constructors-listing-dedicated-worker.html [ Failure ]
+crbug.com/400507 virtual/stable/webexposed/global-constructors-listing-shared-worker.html [ Failure ]
+crbug.com/400507 virtual/stable/webexposed/global-constructors-listing.html [ Failure ]
+crbug.com/400507 webexposed/global-constructors-listing-dedicated-worker.html [ Failure ]
+crbug.com/400507 webexposed/global-constructors-listing-shared-worker.html [ Failure ]
+crbug.com/400507 webexposed/global-constructors-listing.html [ Failure ]
+
 # Flaky
 crbug.com/395127 http/tests/w3c/webperf/approved/UserTiming/test_user_timing_measure_navigation_timing.htm [ Failure Pass ]