Fixing the DOM event streams test to work on FF and IE.

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 858ea6024f0e3cbea634bc442e945e7377f41d91..4b715c5c1451527ff8bdd9243b3ab7777b2ccce4 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -72,7 +72,6 @@ native_gc_test: Fail, Pass # BUG(7774): Untriaged.
 serialized_script_value_test: Fail
 shadow_dom_test/supported: Fail
 storage_test: Fail, Pass
-streams_test: Fail # Bug 7888
 svgelement_test/additionalConstructors: Fail
 svgelement2_test: Fail
 svg_3_test: Fail
@@ -132,7 +131,6 @@ mutationobserver_test/supported: Fail
 postmessage_structured_test: Skip   # BUG(5685): times out.
 serialized_script_value_test: Fail
 shadow_dom_test/supported: Fail
-streams_test: Fail # Bug 7888
 svg_3_test: Fail
 svgelement_test/additionalConstructors: Fail
 svgelement2_test: Fail
@@ -231,7 +229,6 @@ input_element_test/supported_week: Fail
 input_element_test/supported_number: Fail
 input_element_test/supported_range: Fail
 shadow_dom_test/supported: Fail
-streams_test: Fail # Bug 7888
 # Interfaces not implemented: SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable
 svg_3_test: Fail
 svgelement_test/additionalConstructors: Fail