Detect if webkitNotifications is available and remove webkit prefix (replaced

tests/html/html.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 window_open_test: Skip # http://dartbug.com/5151
 
 event_test: Skip  # Issue 1996
 webgl_1_test: Skip  # Issue 1495
 
 # Layout tests are only supported on DRT.
@@ skipping 36 matching lines @@
 css_test: Fail
 document_test/supports_cssCanvasContext: Fail
 element_test/click: Fail                # IE does not support firing this event.
 element_types_test/supported_content: Fail
 element_types_test/supported_details: Fail
 element_types_test/supported_keygen: Fail
 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
 input_element_test/supported_date: Fail
 input_element_test/supported_datetime: Fail
 input_element_test/supported_datetime-local: Fail
 input_element_test/supported_month: Fail
 input_element_test/supported_time: Fail
 input_element_test/supported_week: Fail
 isolates_test: Skip
@@ skipping 36 matching lines @@
 #
 # Investigate and triage the following into bug reports.
 #
 audiobuffersourcenode_test: Fail
 audiocontext_test: Fail
 blob_constructor_test: Fail
 cache_test: fail              # IE9 does not support ApplicationCache, but IE 10 does (and should work).
 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
 input_element_test/supported_date: Fail
 input_element_test/supported_datetime-local: Fail
 input_element_test/supported_datetime: Fail
 input_element_test/supported_email: Fail
 input_element_test/supported_month: Fail
 input_element_test/supported_number: Fail
 input_element_test/supported_range: Fail
@@ skipping 56 matching lines @@
 canvas_test: Fail
 css_test: Fail
 cssstyledeclaration_test: Fail
 element_add_test: Fail
 element_constructor_1_test: Fail
 element_test/constructors: Fail
 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
 performance_api_test/supported: Fail
 serialized_script_value_test: Fail
 svg_3_test: Fail
 svgelement_test/additionalConstructors: Fail
 svgelement2_test: Fail
 typed_arrays_arraybuffer_test: Fail
 url_test: Fail
 fileapi_test: Skip # Timeout.
 inner_frame_test: Skip # Timeout.
 js_interop_3_test: Skip # Timeout.
 js_interop_4_test: Skip # Timeout.
 isolates_test: Skip # Timeout.
 websql_test: Skip # Timeout.
 
 [ $runtime == ff ]
 audiobuffersourcenode_test: Fail # FF only has Audio element.
 audiocontext_test: Fail      # FF only has Audio element
 css_test: Fail               # No analog to WebKitCssMatrix
 dart_object_local_storage_test: Skip  # sessionStorage NS_ERROR_DOM_NOT_SUPPORTED_ERR
 document_test/supports_cssCanvasContext: Fail
 element_types_test/supported_content: Fail
 element_types_test/supported_details: Fail
 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
 input_element_test/supported_date: Fail
 input_element_test/supported_datetime: Fail
 input_element_test/supported_datetime-local: Fail
 input_element_test/supported_month: Fail
 input_element_test/supported_time: Fail
 input_element_test/supported_week: Fail
 input_element_test/supported_number: Fail
@@ skipping 23 matching lines @@
 
 [ $compiler == dart2js && ($runtime == drt || $runtime == ff) ]
 request_animation_frame_test: Skip # Async test hangs.
 
 [ $compiler == dart2js && ($runtime == drt || $runtime == chrome || $runtime == ff || $runtime == safari) ]
 isolates_test: Skip   # Timeout because leg does not support web workers.
 
 [ $compiler == dart2js && $runtime == ff ]
 inner_frame_test: Skip # Timeout
 svg_3_test: Skip # Timeout