dart2js cps: Ensure JSArray is emitted when we see a type cast.

tests/compiler/dart2js_extra/dart2js_extra.status

Index: tests/compiler/dart2js_extra/dart2js_extra.status
diff --git a/tests/compiler/dart2js_extra/dart2js_extra.status b/tests/compiler/dart2js_extra/dart2js_extra.status
index f5a4292cb8a02c78b2a401254cfc49a803878eef..17d645cb4782102f588005a948cdb5d49f79c443 100644
--- a/tests/compiler/dart2js_extra/dart2js_extra.status
+++ b/tests/compiler/dart2js_extra/dart2js_extra.status
@@ -64,18 +64,12 @@ deferred_fail_and_retry_worker_test: SkipByDesign # Uses eval to simulate failed
 21724_test: Crash # Please triage this failure.
 
 [ $compiler == dart2js && $cps_ir ]
-11673_test: RuntimeError # Cannot read property 'prototype' of undefined
-12320_test: RuntimeError # Cannot read property 'prototype' of undefined
 16407_test: Pass # Please triage this failure.
-22487_test: RuntimeError # Cannot read property 'prototype' of undefined
 22868_test: Crash # (main()async{var clo...  cannot handle async/sync*/async* functions
 22895_test: Crash # (main()async{var clo...  cannot handle async/sync*/async* functions
-23404_test: RuntimeError # Cannot read property 'prototype' of undefined
 23432_test : RuntimeError # 
-LayoutTests_fast_mediastream_getusermedia_t01_test/none: RuntimeError # Cannot read property 'prototype' of undefined
 async_stacktrace_test/asyncStar: Crash # (runTests()async{awa...  cannot handle async/sync*/async* functions
 async_stacktrace_test/none: Crash # (runTests()async{awa...  cannot handle async/sync*/async* functions
-closure5_test: RuntimeError # Cannot read property 'prototype' of undefined
 closure_capture5_test: Crash # (i=0): For-loop variable captured in loop header
 conditional_send_test: RuntimeError # receiver.get$_collection$_nums is not a function
 deferred/deferred_class_test: RuntimeError # receiver.get$_collection$_nums is not a function
@@ -100,7 +94,6 @@ mirrors_used_warning2_test : RuntimeError # TypeError: receiver.get$_nums is not
 mirrors_used_warning_test/minif : RuntimeError # TypeError: receiver.get$_nums is not a function
 mirrors_used_warning_test/none : RuntimeError # TypeError: receiver.get$_nums is not a function
 reflect_native_types_test: Crash # Internal Error: No default constructor available.
-runtime_type_test: RuntimeError # Cannot read property 'prototype' of undefined
 switch_test/none: Crash # (switch (val){foo:ba...  continue to a labeled switch case
 timer_test: RuntimeError # receiver.get$_collection$_nums is not a function
 no_such_method_test : Crash # Internal Error: No default constructor available.