Add proper API for creating private symbols wrt a library.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index 1e442d263ecbb3d17294b6026ac3bed64f3c2e30..87775606eb8fcac9803838ead60e74058ab5515e 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -12,6 +12,8 @@ mirrors/fake_function_test: RuntimeError # Issue 11612
 mirrors/function_type_mirror_test: RuntimeError # Issue 12166
 mirrors/generics_test/01: RuntimeError # Issue 12333
 mirrors/hierarchy_invariants_test: RuntimeError # Issue 11863
+mirrors/intercepted_class_test: RuntimeError # Issue 13644
+mirrors/intercepted_object_test: RuntimeError # Issue 13644

[ahe, 2013/10/11 10:27:15]

This seems to decrease test-coverage of dart2js. Can't you modify some other
tests?

[rmacnak, 2013/10/11 20:39:33]

Refactored.

 mirrors/invoke_test: RuntimeError # Issue 11954
 mirrors/invoke_closurization_test: RuntimeError # Issue 13002
 mirrors/invoke_named_test/none: RuntimeError # Issue 12863
@@ -41,6 +43,8 @@ mirrors/redirecting_factory_test/02: RuntimeError # Issue 6490
 mirrors/closures_test/none: RuntimeError # Issue 6490
 mirrors/library_metadata2_test/01: CompileTimeError # Issue 13633
 async/stream_controller_async_test: Pass, Fail # Issue 13608
+mirrors/symbol_validation_test: RuntimeError # Issue 13597
+mirrors/private_symbol_test: CompileTimeError # Issue 13597
 
 [ $compiler == dart2js && $checked ]
 mirrors/redirection_type_shuffling_test: RuntimeError # Issue 13706
@@ -144,6 +148,7 @@ mirrors/hierarchy_test: Fail # TODO(ahe): This test is slightly broken. http://d
 mirrors/mixin_test/01: Fail, OK # TODO(ahe): Slight broken test to ensure test coverage on dart2js.
 mirrors/typedef_test/01: Fail, OK # Incorrect dart2js behavior.
 mirrors/closures_test/01: Fail, OK # Incorrect dart2js behavior.
+mirrors/symbol_validation_test: RuntimeError # Issue 13596
 
 [ $compiler == none && $runtime == drt ]
 async/timer_isolate_test: Skip # See Issue 4997