Detect if webkitNotifications is available and remove webkit prefix (replaced

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 673876429aae3909d35f08404bb6ffc449c2f375..d36db6eeb0067d93b6c0b64328673b041fcb17bf 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -54,7 +54,7 @@ element_types_test/supported_meter: Fail
 element_types_test/supported_object: Fail
 element_types_test/supported_output: Fail
 element_types_test/supported_shadow: Fail
-exceptions_test: Fail
+exceptions_test/supported: Fail
 form_data_test: Fail # TODO(efortuna): Issue 7875.
 fileapi_test/supported: Fail
 inner_frame_test: Skip
@@ -111,7 +111,7 @@ cache_test: fail              # IE9 does not support ApplicationCache, but IE 10
 css_test: Fail
 dom_constructors_test: Fail
 element_test/matches: Fail # IE9 does not support matches
-exceptions_test: Fail
+exceptions_test/supported: Fail
 fileapi_test/supported: Fail
 history_test/supported_state: Fail
 indexeddb_1_test/supported: Fail
@@ -188,7 +188,7 @@ element_test/elements: Fail
 element_test/eventListening: Crash
 element_test/queryAll: Fail
 element_webkit_test: Fail
-exceptions_test: Fail
+exceptions_test/supported: Fail
 htmlelement_test: Fail
 indexeddb_1_test/supported: Fail
 mutationobserver_test/supported: Fail
@@ -218,7 +218,7 @@ element_types_test/supported_embed: Fail
 element_types_test/supported_keygen: Fail
 element_types_test/supported_shadow: Fail
 element_types_test/supported_track: Fail
-exceptions_test: Fail      # Uses webkitotifications, no analogue in moz
+exceptions_test/supported: Fail
 fileapi_test/supported: Fail
 # setup code fails. prepare. (DOM callback has errors) Caught [object Event]
 inner_frame_test: Skip