Remove dart2js skips that have bogus reasons for skipping.

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.
 
 async_window_test: Skip #TODO(gram): investigating
 event_test: Skip  # Issue 1996
 interactive_test: Skip # Must be run manually.
 
 [ $compiler == dart2js && $runtime != drt ]
 custom/*: Skip
@@ skipping 75 matching lines @@
 websql_test: Fail, Pass # Issue 4941: stderr contains a backtrace.
 
 [ $compiler == dart2js && $runtime == drt && $system == macos]
 audiobuffersourcenode_test: Pass, Fail
 
 [$runtime == ie10 ]
 dromaeo_smoke_test: Skip #TODO(efortuna): investigating.
 element_test/click: Fail                # IE does not support firing this event.
 history_test/history: Pass, Fail # issue 8183
 indexeddb_1_test/functional: Fail # Issue 9269 + 12893
-isolates_test: Skip
 microtask_test: Fail, Pass # Appears to be flaky
 native_gc_test: Fail, Pass # BUG(7774): Untriaged.
 serialized_script_value_test: Fail
 storage_test: Fail, Pass
 transferables_test: Fail # Issue 9846
 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
 worker_test/functional: Fail # IE uses incorrect security context for Blob URIs.
 
@@ skipping 40 matching lines @@
 xhr_test/supported_overrideMimeType: Fail
 xsltprocessor_test/supported: Fail
 
 [ $runtime == ie9 ]
 blob_constructor_test: Fail
 document_test/document: Pass, Fail # BUG(9654) need per-instance patching
 dom_constructors_test: Fail
 dromaeo_smoke_test: Skip #TODO(efortuna): investigating.
 element_test/click: Fail                # IE does not support firing this event.
 form_element_test: Fail # Issue 4793.
-isolates_test: Skip         # BUG(4016)
 localstorage_test: Fail
 microtask_test: Pass, Fail # http://dartbug.com/8300
 postmessage_structured_test: Skip   # BUG(5685): times out.
 serialized_script_value_test: Fail
 url_test: Fail              # IE9 does not support createObjectURL (it is supported in IE10)
 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
 canvasrenderingcontext2d_test/drawImage_image_element: Pass, Fail # Issue: 11416
 input_element_test/attributes: Fail # IE returns null while others ''
 xhr_cross_origin_test: Skip # Issue 12920
@@ skipping 186 matching lines @@
 input_element_test/supported_week: Fail
 media_stream_test/supported_MediaStreamEvent: Fail
 media_stream_test/supported_MediaStreamTrackEvent: Fail
 notifications_test/supported: Fail
 shadow_dom_test/supported: Fail
 speechrecognition_test/supported: Fail
 touchevent_test/supported: Fail
 websql_test/supported: Fail
 xhr_test/supported_HttpRequestProgressEvent: Fail
 
-
 # 'html' tests import the HTML library, so they only make sense in
 # a browser environment.
 [ $runtime == vm ]
 *: Skip
 
 [ $compiler == dart2js && ($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 && $csp && ($runtime == drt || $runtime == safari || $runtime == ff || $runtime == chrome || $runtime == chromeOnAndroid) ]
 # Note: these tests are all injecting scripts by design.  This is not allowed under CSP.
 event_customevent_test: Fail       # Test cannot run under CSP restrictions.
 js_interop_1_test: Skip            # Test cannot run under CSP restrictions (times out).
 js_interop_2_test: Fail, OK        # Test cannot run under CSP restrictions.
 js_interop_3_test: Skip            # Test cannot run under CSP restrictions (times out).
 js_test: Skip                      # Test cannot run under CSP restrictions (times out).
 postmessage_structured_test: Skip  # Test cannot run under CSP restrictions (times out).
 safe_dom_test: Skip                # Test cannot run under CSP restrictions (times out).
 
 [ $compiler == dart2js && $runtime == drt ]
 wheelevent_test: Fail # http://dartbug.com/12958