Fix test status for Notification and MediaSource tests

tests/html/html.status

 # Copyright (c) 2013, 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.
 
 event_test: Skip  # Issue 1996
 interactive_test: Skip # Must be run manually.
 dromaeo_smoke_test: Skip # Issue 14521, 8257
 cross_frame_test: Skip # Test reloads itself. Issue 18558
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
@@ skipping 105 matching lines @@
 websocket_test/websocket: Fail # TODO(efortuna): Issue 7875.
 canvasrenderingcontext2d_test/drawImage_video_element: Fail # IE does not support drawImage w/ video element
 canvasrenderingcontext2d_test/drawImage_video_element_dataUrl: Fail # IE does not support drawImage w/ video element
 no_linked_scripts_htmltest: Skip # Times out on IE.  Issue 21537
 scripts_htmltest: Skip # Times out on IE.  Issue 21537
 two_scripts_htmltest: Skip # Times out on IE.  Issue 21537
 deferred_multi_app_htmltest: Skip # Times out on IE.  Issue 21537
 localstorage_test: Pass, RuntimeError # Issue 22166
 storage_test: Pass, RuntimeError # Issue 22166
 postmessage_structured_test/more_primitives: Fail # Does not support the MessageEvent constructor.
-notification_test: Fail # Notification not supported on IE
+notification_test/supported: Fail # Notification not supported on IE
 
 [$runtime == ie10 || $runtime == ie11 || ($runtime == chrome && $system == macos)]
 transition_event_test/functional: Skip # Times out. Issue 22167
 request_animation_frame_test: Skip # Times out. Issue 22167
 
 [$runtime == ie10 ]
 # IE10 Feature support statuses-
 # All changes should be accompanied by platform support annotation changes.
 audiobuffersourcenode_test/supported: Fail
 audiocontext_test/supported: Fail
@@ skipping 98 matching lines @@
 
 [ $compiler == dart2js && $runtime == drt && $unchecked ]
 audiocontext_test/functional: Pass, Fail
 
 [ $runtime == safari || $runtime == safarimobilesim ]
 worker_api_test: Skip # Issue 13221
 webgl_1_test: Pass, Fail # Issue 8219
 canvasrenderingcontext2d_test/drawImage_video_element: Fail # Safari does not support drawImage w/ video element
 canvasrenderingcontext2d_test/drawImage_video_element_dataUrl: Fail # Safari does not support drawImage w/ video element
 element_test: Pass, Fail # Issue 21434
+mediasource_test: Pass, Fail # MediaSource only available on Safari 8 desktop, we can't express that.
+notification_test/constructors: Fail # Safari doesn't let us access the Notification fields to verify them
 
 # Safari Feature support statuses-
 # All changes should be accompanied by platform support annotation changes.
 element_types_test/supported_content: Fail
 element_types_test/supported_datalist: Fail
 element_types_test/supported_shadow: Fail
 fileapi_test/supported: Fail
 indexeddb_1_test/supportsDatabaseNames: Fail
 media_stream_test/supported_MediaStreamEvent: Fail
 media_stream_test/supported_MediaStreamTrackEvent: Fail
@@ skipping 138 matching lines @@
 htmlelement_test: StaticWarning
 localstorage_test: StaticWarning
 mutationobserver_test: StaticWarning
 queryall_test: fail
 track_element_constructor_test: StaticWarning
 transferables_test: StaticWarning
 typed_arrays_range_checks_test: StaticWarning
 typing_test: StaticWarning
 webgl_1_test: StaticWarning
 window_nosuchmethod_test: StaticWarning