dart2js: Fix an issue with erroneous for-in.

tests/language/language_dart2js.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.
 
 [ $compiler == dart2js ]
 sync_generator2_test/07: MissingCompileTimeError # Issue 22324
 sync_generator2_test/08: MissingCompileTimeError # Issue 22324
 sync_generator2_test/10: MissingCompileTimeError # Issue 22324
 getter_setter_in_lib_test: Fail # Issue 23288
 
@@ skipping 260 matching lines @@
 await_for_cancel_test: Crash # (await for(var x in controller.stream){for(int j=0;j<10;j++ ){if(j==5)continue outer;}}): await for
 await_for_test: Crash # (await for(var x in infiniteStream()){i++ ;if(i>10)break;t4.record(x);}): await for
 await_for_use_local_test: Crash # (await for(var v in s){accum+= v;}): await for
 call_closurization_test: RuntimeError # Bad type inference for ".call" tear-off.
 cha_deopt1_test: Crash # (d.make_u()): deferred access is not implemented
 cha_deopt2_test: Crash # (d.make_u()): deferred access is not implemented
 cha_deopt3_test: Crash # (d.make_u()): deferred access is not implemented
 closure_in_constructor_test: RuntimeError # Please triage this failure.
 closures_initializer_test: RuntimeError # Please triage this failure.
 constructor12_test: RuntimeError # Please triage this failure.
-crash_6725_test/01: Crash # unsupported operation on erroneous element
 deferred_call_empty_before_load_test: Crash # (lib1.thefun()): deferred access is not implemented
 deferred_closurize_load_library_test: RuntimeError # D.loadLibrary is not a function
 deferred_constant_list_test: RuntimeError # K.loadLibrary is not a function
 deferred_constraints_constants_test/none: RuntimeError # S.loadLibrary is not a function
 deferred_constraints_constants_test/reference_after_load: RuntimeError # G.loadLibrary is not a function
 deferred_constraints_type_annotation_test/as_operation: RuntimeError # Z.loadLibrary is not a function
 deferred_constraints_type_annotation_test/catch_check: RuntimeError # D.loadLibrary is not a function
 deferred_constraints_type_annotation_test/is_check: RuntimeError # L.loadLibrary is not a function
 deferred_constraints_type_annotation_test/new: RuntimeError # R.loadLibrary is not a function
 deferred_constraints_type_annotation_test/new_before_load: RuntimeError # K.loadLibrary is not a function
@@ skipping 63 matching lines @@
 type_variable_field_initializer_closure_test: RuntimeError # Please triage this failure.
 type_variable_field_initializer_test: RuntimeError # Please triage this failure.
 type_variable_nested_test: RuntimeError # Please triage this failure.
 
 [ $compiler == dart2js && $cps_ir && $host_checked ]
 async_throw_in_catch_test/forceAwait: Crash # Issue 24485
 async_throw_in_catch_test/none: Crash # Issue 24485
 execute_finally9_test: Crash # Issue 24485
 regress_21795_test: Crash # Issue 24485
 regress_23537_test: Crash # Issue 24485