Adding supported checks for getCssCanvasContext.

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 40 matching lines @@
 audiocontext_test: Pass, Fail
 
 [ $compiler == dart2js && $runtime == drt && $system == macos]
 audiobuffersourcenode_test: Pass, Fail
 
 [$runtime == ie10 ]
 # TODO(efortuna, blois): Triage.
 audiobuffersourcenode_test: Fail
 audiocontext_test: Fail
 css_test: Fail
-document_test/getCssCanvasContext: Fail # IE does not support this.
+document_test/supports_cssCanvasContext: Fail
 element_test/additionalConstructors: 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
@@ skipping 18 matching lines @@
 svgelement_test/additionalConstructors: Fail
 svgelement2_test: Fail
 svg_3_test: Fail
 url_test: Fail                           # IE10 does not support from file://
 websql_test: Fail
 window_open_test: Skip
 xhr_test: Fail
 xsltprocessor_test: Fail
 
 [ $runtime == ie9 ]
-document_test/getCssCanvasContext: Fail # IE does not support this.
+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_datalist: 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_progress: Fail
 element_types_test/supported_shadow: Fail
@@ skipping 70 matching lines @@
 shadow_dom_test/supported: Fail
 
 [ $runtime == opera && $system == windows ]
 htmlelement_test: Fail, Pass
 
 [ $runtime == opera && $system == macos ]
 element_test/constructors: Fail
 
 
 [ $runtime == opera ]
-document_test/getCssCanvasContext: Fail # Issue: 7413
+document_test/supports_cssCanvasContext: Fail
 document_test/document: Fail # Issue: 7413
 form_data_test: Fail # Issue: 7413
 keyboard_event_test: Fail # Issue: 7413
 element_test/eventListening: Fail # Issue: 7413
 element_test/children: Fail # Issue: 7413
 audiobuffersourcenode_test: Fail
 cache_test: Fail
 canvas_test: Pass,Fail
 audiocontext_test: Fail
 blob_constructor_test: Fail
@@ skipping 23 matching lines @@
 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/getCssCanvasContext: Fail # FF does not support this.
+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
 fileapi_test: Fail         # FF does not support filesystem APIs.
 indexeddb_1_test/supported: Fail  # FF disables indexedDB from file URLs.
 # setup code fails. prepare. (DOM callback has errors) Caught [object Event]
@@ skipping 34 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 ]
 xhr_test: Skip # Timeout
 inner_frame_test: Skip # Timeout
 svg_3_test: Skip # Timeout