Fix check in exception unwrapping and update status files.

tests/dom/dom.status

Index: tests/dom/dom.status
===================================================================
--- tests/dom/dom.status	(revision 8096)
+++ tests/dom/dom.status	(working copy)
@@ -46,6 +46,12 @@
 # TODO(vsm): Triage DOM failures.
 *: Skip
 
+[ $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
+
 [ $runtime == ff ]
 audiocontext_test: Fail      # FF only has Audio element
 css_test: Fail               # No analogue to WebKitCSSMatrix
@@ -54,10 +60,6 @@
 canvas_using_html_test: Fail # No setFillColor() method.  Use fillstyle attribute instead.
 dart_object_local_storage_test: Fail  # sessionStorage NS_ERROR_DOM_NOT_SUPPORTED_ERR
 exceptions_test: Fail      # Uses webkitotifications, no analogue in moz
-# _toDartException fails to translate TypeError for call to x.set$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
@@ -126,7 +128,6 @@
 [ $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