Minimal fix to get cross frame tests working.

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 00d65e2634cca0aed9ccf2c52e15b153adabb52c..6d82838d466951d803fd25d4cfb2f0c278e062b0 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -23,8 +23,6 @@ request_animation_frame_test: Skip   # drt hangs
 
 [ $compiler == frog && ($runtime == drt || $runtime == ie || $runtime == safari || $runtime == ff || $runtime == chrome || $runtime == opera) ]
 window_nosuchmethod_test: Fail # Issue 1837, frog puts top-level members in the global JS namespace.
-cross_frame_test: Fail # Issue 2774, iframe.contentDocument is accessible in dart:html frog.
-inner_frame_test: Fail # Issue 2774
 
 [ $runtime == ie || $runtime == safari || $runtime == ff || $runtime == chrome || $runtime == opera || ($runtime == drt && $compiler == frog)]
 # TODO(vsm): Triage DOM tests.
@@ -153,8 +151,6 @@ dom_isolates_test: Fail # error: cannot resolve spawnDomIsolate
 [ $compiler == dart2js && ($runtime == drt || $runtime == chrome || $runtime == ff) ]
 isolates_test: Skip   # Timeout because leg does not support web workers.
 typed_arrays_1_test: Fail # dart2js doesn't support is checks with generic types.
-cross_frame_test: Fail # Issue 2774, iframe.contentDocument is accessible in dart:html
-inner_frame_test: Fail # Issue 2774
 
 # DOM errors.
 indexeddb_2_test: Fail # Uncaught error