Fix check in exception unwrapping and update status files.

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.
 
 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
 measurement_test: Pass, Fail  # Issue 1940
 
@@ skipping 48 matching lines @@
 xhr_test: Fail
 
 [ $runtime == safari ]
 canvas_pixel_array_type_alias_test: Fail # Caught TypeError: 'undefined' is not a function
 cssstyledeclaration_test: Fail
 element_test: Fail
 node_test: Fail
 svgelement_test: Fail
 svgelement2_test: Fail
 
+[ $compiler == frog && $runtime == ff ]
+# _toDartException fails to translate TypeError for call to x.set$onfocus(null)
+hidden_dom_1_test: Fail
+# _toDartException fails to translate TypeError for call to x.appendChild$_(y)
+hidden_dom_2_test: Fail
+
 [ $runtime == ff ]
 audiocontext_test: Fail      # FF only has Audio element
 css_test: Fail               # No analog to WebKitCSSMatrix
 cssstyledeclaration_test: Fail
 callbacks_test: Fail         # (webkit|moz|ms)RequestAnimationFrame
 canvas_test: Fail            # No setFillColor() method.  Use fillstyle attribute instead.
 canvas_using_html_test: Fail # No setFillColor() method.  Use fillstyle attribute instead.
 dart_object_local_storage_test: Skip  # sessionStorage NS_ERROR_DOM_NOT_SUPPORTED_ERR
 documentfragment_test: Fail
 element_test: Fail
 exceptions_test: Fail      # Uses webkitotifications, no analogue in moz
-# _toDartException fails to translate TypeError for call to x.set$onfocus(null)
-hidden_dom_1_test: Fail
-# _toDartException fails to translate TypeError for call to x.appendChild$_(y)
-hidden_dom_2_test: Fail
 indexeddb_1_test: Fail     # Need window.mozIndexedDB instead of window.webkitIndexedDB
 indexeddb_2_test: Fail     # Need window.mozIndexedDB instead of window.webkitIndexedDB
 indexeddb_3_test: Fail     # Need window.mozIndexedDB instead of window.webkitIndexedDB
 indexeddb_4_test: Fail     # Need window.mozIndexedDB instead of window.webkitIndexedDB
 instance_of_test: Fail     # Issue 2535
 # setup code fails. prepare. (DOM callback has errors) Caught [object Event]
 inner_frame_test: Skip
 localstorage_test: Fail
 # Interfaces not implemented: SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable
 svg_3_test: Fail
@@ skipping 80 matching lines @@
 indexeddb_2_test: Fail # Uncaught error
 window_open_test: Fail # TypeError: Object [object Window] has no method 'close$0'
 
 [ $compiler == dart2js && $runtime == chrome && $system == macos ]
 element_test: Fail # method not found: 'get$add'
 fileapi_test: Skip # Issue 3022
 
 [ $compiler == dart2js && $runtime == ff ]
 cache_test: Fail # Expectation: ApplicationCache. Caught NoSuchMethodException : method not found: 'get$status'
 canvas_pixel_array_type_alias_test: Fail # Expectation: CreateImageData. Caught NoSuchMethodException : method not found: 'get$data'
-window_nosuchmethod_test: Fail # Expectation: windowNonMethod. Caught Instance of 'TypeError'
 xhr_test: Skip # Timeout
 inner_frame_test: Skip # Timeout
 svg_3_test: Skip # Timeout
 documentfragment_test: Skip # Timeout
 fileapi_test: Skip # Issue 3022
 
 [ $compiler == dart2js && $runtime == chrome && $system == windows]
 css_test: Pass, Fail # Issue #2823
 element_test: Fail # method not found: 'get$add'
 fileapi_test: Skip # Issue 3022