Lay waste to ClosureMirror.findInContext.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index abfeec8d3cb99112dbba9db1ca90d4be99928661..187846524338d16f44e8fcdee57243989e483793 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -38,9 +38,6 @@ mirrors/delegate_call_through_getter_test: RuntimeError # Issue 15138
 mirrors/equality_test/02: RuntimeError # Issue 12785
 mirrors/fake_function_with_call_test: RuntimeError # Issue 11612
 mirrors/fake_function_without_call_test: RuntimeError # Issue 11612
-mirrors/find_in_context_test: Fail # Issue 6490
-mirrors/find_in_context_private_test: Fail # Issue 6490
-mirrors/find_in_context_fake_function_test: Fail # Issue 6490
 mirrors/function_type_mirror_test: RuntimeError # Issue 12166
 mirrors/generic_f_bounded_mixin_application_test: RuntimeError # Issue 12087
 mirrors/generic_function_typedef_test: RuntimeError # Issue 12333
@@ -289,11 +286,6 @@ convert/utf85_test: Pass, Slow # Issue 12644.
 async/schedule_microtask5_test: Pass, Timeout # Issue 13719: Please triage this failure.
 async/timer_cancel2_test: Pass, Timeout # Issue 13719: Please triage this failure.
 
-[ $compiler == none && ($runtime == dartium || $runtime == ContentShellOnAndroid) ]
-mirrors/find_in_context_test: Fail # Issue 13719: Needs VM flag
-mirrors/find_in_context_private_test: Fail # Issue 13719: Needs VM flag
-mirrors/find_in_context_fake_function_test: Fail # Issue 13719: Needs VM flag
-
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 # Issue 13921: spawnFunction is not allowed on Dartium's DOM thread.
 async/timer_isolate_test: Fail