Provide a fallback for AudioBufferSourceNode.start to noteOn and stop to

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: Fail, Pass # http://dartbug.com/5151
 
 event_test: Skip  # Issue 1996
 webgl_1_test: Skip  # Issue 1495
 xmldocument_test: Skip  # XML in dart:html is incomplete
 xmlelement_test: Skip  # XML in dart:html is incomplete
 
 [ $runtime == chrome ]
 contentelement_test: Fail   # Issue 5445: not currently supported on chrome stable.
 
 [ $runtime == drt ]
 xhr_cross_origin_test: Skip  # Issue 4502: Passes with --allow-external-pages.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) ]
 request_animation_frame_test: Skip   # drt hangs; requestAnimationFrame not implemented
 
 [ $compiler == none && $runtime == drt && $system == windows]
+audiobuffersourcenode_test: Skip
 audiocontext_test: Skip
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) && $system == windows]
 websql_test: Skip # Issue 4941: stderr contains a backtrace.
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium) && $mode == debug]
 websql_test: Fail, Pass # Issue 4941: stderr contains a backtrace.
 
 [ $compiler == dart2js && $runtime == drt && $system == windows]
 audiocontext_test: Fail # Issue 4517
 audioelement_test: Fail # Issue 4517
 blob_constructor_test: Fail # Issue 4517
 css_test: Fail # Issue 4517
 htmlaudioelement_test: Fail # Issue 4517
 form_data_test: Fail # Possibly Issue 4517
 fileapi_test: Fail # Possibly Issue 4517
 websql_test: Pass, Fail # Possibly Issue 4517
 
 [ $compiler == none && $runtime == drt && $system == macos]
 audiocontext_test: Pass, Fail
 
+[ $compiler == dart2js && $runtime == drt && $system == macos]
+audiobuffersourcenode_test: Pass, Fail
+
 [ $compiler == none && $runtime == drt && $system == linux]
 documentfragment_test: Pass, Timeout
 
 [ $runtime == ie || $runtime == safari || $runtime == ff || $runtime == chrome || $runtime == opera ]
 # TODO(vsm): Triage DOM tests.
 htmloptionscollection_test: Fail # Issue 3813.
 shadow_dom_test: Skip # No ShadowDOM support except on tip dartium.
 shadow_dom_layout_test: Skip
 unknownelement_test: Fail # Issue 4189
 
@@ skipping 14 matching lines @@
 typed_arrays_range_checks_test: Fail
 element_test: Fail
 localstorage_test: Fail
 node_test: Fail
 svgelement_test: Fail
 svgelement2_test: Fail
 websql_test: Fail # IE does not support web SQL
 #
 # Investigate and triage the following into bug reports.
 #
+audiobuffersourcenode_test: Fail
 audiocontext_test: Fail
 blob_constructor_test: Fail
 cache_test: Fail
 canvas_test: Fail
 canvas_using_html_test: Fail
 css_test: Fail
 datalistelement_test: Fail    # ie9 does not have HTMLDataListElement
 dom_constructors_test: Fail
 exceptions_test: Fail
 fileapi_test: Fail          # IE does not support filesystem APIs.
@@ skipping 27 matching lines @@
 indexeddb_3_test: Fail # indexedDB not in Safari 6.
 indexeddb_4_test: Fail # indexedDB not in Safari 6.
 indexeddb_1_test: Fail # indexedDB not in Safari 6.
 fileapi_test: Fail # requestFileSystem not supported in Safari 6.
 datalistelement_test: Fail # HTMLDataListElement not yet supported in Safari.
 contentelement_test: Fail # Safari 6 does not support content element.
 # The following tests all fail in Safari 5.1. (NOT Mountain Lion). These will go
 # away after we upgrade the buildbots to Mountain Lion after M1.
 # TODO(efortuna): Make our test framework able to separate tests out by browser
 # version.
+audiobuffersourcenode_test: Fail
 audiocontext_test: Fail
 blob_constructor_test: Fail
 canvas_pixel_array_type_alias_test: Fail
 canvas_test: Fail
 canvas_using_html_test: Fail
 datalistelement_test: Pass,Fail
 document_test: Fail
 dom_constructors_test: Fail
 element_add_test: Fail
 element_constructor_1_test: Fail
 element_test: Fail
 exceptions_test: Fail
 instance_of_test: Fail
 mutationobserver_test: Fail
 native_gc_test: Fail
 node_test: Fail
 serialized_script_value_test: Fail
 svgelement2_test: Fail
 svgelement_test: Fail
 url_test: Fail
 
 [ $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
 canvas_test: Fail            # No setFillColor() method.  Use fillstyle attribute instead.
 canvas_using_html_test: Fail # No setFillColor() method.  Use fillstyle attribute instead.
 contentelement_test: Fail    # FF does not support content element.
 dart_object_local_storage_test: Skip  # sessionStorage NS_ERROR_DOM_NOT_SUPPORTED_ERR
 documentfragment_test: Fail
 element_test: Fail
 exceptions_test: Fail      # Uses webkitotifications, no analogue in moz
 fileapi_test: Fail         # FF does not support filesystem APIs.
@@ skipping 62 matching lines @@
 
 [ $compiler == dart2js && $runtime == chrome && $system == windows]
 css_test: Pass, Fail # Issue #2823
 
 [ $compiler == dart2js && $runtime == ff && $system == windows]
 js_interop_2_test: Fail # Issue 4658.
 js_interop_3_test: Fail # Issue 4658.
 
 [ $compiler == dart2js && $checked && $browser]
 fileapi_test: Fail # TypeError: Object #<DirectoryEntry> has no method 'get$name'