Add HTML test with two dart scripts on one page.

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
 
 [ $compiler == none && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 custom/attribute_changed_callback_test/unsupported_on_polyfill: Fail # Issue 18931 (Disabled for Chrome 35 roll)
 custom/document_register_basic_test: RuntimeError # Issue 20813
 fontface_loaded_test: Skip # Issue 21359
 form_data_test/functional: Skip # Issue 19726
 indexeddb_1_test/functional: Skip # Issue 19512 (timing out)
 indexeddb_4_test: Skip # Issue 19726
 mouse_event_test: Fail # Issue 20437
 storage_quota_test/missingenumcheck: Fail
+worker_api_test: Fail # Issue 10223
+two_scripts_htmltest: Fail # Issue 16603
 
 [ $compiler == none && $mode == debug && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
 datalistelement_test: Skip # Issue 20540
 
 [ $compiler == dart2js ]
 input_element_test/attributes: Fail # Issue 21555
 
 [ $compiler == dart2js && $csp ]
 custom/js_custom_test: Fail # Issue 14643
 custom/element_upgrade_test: Fail # Issue 17298
@@ skipping 67 matching lines @@
 element_types_test/supported_meter: RuntimeError # Issue 18573
 
 [ $runtime == chrome ]
 touchevent_test/supported: Pass, Fail # Issue 17061
 xhr_cross_origin_test: Pass, Fail # Issue 11884
 xhr_test: Pass, Fail # Issue 11884
 
 [$runtime == drt || $runtime == dartium || $runtime == chrome || $runtime == chromeOnAndroid || $runtime == ContentShellOnAndroid ]
 webgl_1_test: Pass, Fail # Issue 8219
 
-[ $compiler == none && ($runtime == drt || $runtime == dartium || $runtime == ContentShellOnAndroid) ]
-worker_api_test: Fail # http://dartbug.com/10223
-
 [ $compiler == none && ($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.
 native_gc_test: Pass, Slow
 
 [ $compiler == dart2js && $runtime == drt && $system == macos]
 audiobuffersourcenode_test: Pass, Fail
 
 [$runtime == ie10 || $runtime == ie11]
 indexeddb_5_test: Fail # Issue 12893
 js_test: Fail # Issue 14246
 element_test/click: Fail                # IE does not support firing this event.
 serialized_script_value_test: Fail
 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
 
 [$runtime == ie10 ]
 # IE10 Feature support statuses-
 # All changes should be accompanied by platform support annotation changes.
 audiobuffersourcenode_test/supported: Fail
 audiocontext_test/supported: Fail
 crypto_test/supported: Fail
 css_test/supportsPointConversions: Fail
 document_test/supports_cssCanvasContext: Fail
 element_types_test/supported_content: Fail
@@ skipping 238 matching lines @@
 events_test: StaticWarning
 htmlelement_test: StaticWarning
 localstorage_test: StaticWarning
 mutationobserver_test: StaticWarning
 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