The bots are using a cached version of the tests that is invalid now that the shared flags are pass…

tests/corelib/corelib.status

Index: tests/corelib/corelib.status
===================================================================
--- tests/corelib/corelib.status	(revision 29679)
+++ tests/corelib/corelib.status	(working copy)
@@ -2,7 +2,6 @@
 # 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.
 
-# Skip these tests until XXX.fromEnvironment in dart2js lands.
 [ $compiler == dart2dart]
 bool_from_environment2_test: Skip
 bool_from_environment_default_value_test: Skip
@@ -43,6 +42,21 @@
 string_from_environment3_test/03: Fail
 string_from_environment3_test/04: Fail
 
+# Skip these tests until we wipe the compilation cache of bots.
+[ $browser ]
+bool_from_environment2_test: Skip
+bool_from_environment_default_value_test: Skip
+bool_from_environment_test: Skip
+int_from_environment2_test: Skip
+int_from_environment3_test: Skip
+int_from_environment_default_value_test: Skip
+int_from_environment_test: Skip
+string_from_environment2_test: Skip
+string_from_environment3_test: Skip
+string_from_environment_default_value: Skip
+string_from_environment_test: Skip
+
+
 [ $compiler == none ]
 unicode_test: Fail        # Bug 6706
 compare_to2_test: Fail    # Bug 4018