Revert "Make window.{undefined,NaN,Infinity} read-only"

test/es5conform/es5conform.status

Index: test/es5conform/es5conform.status
diff --git a/test/es5conform/es5conform.status b/test/es5conform/es5conform.status
index 3a56f0b010b66133798f15d7c14a5d17ea06711b..55712baf69cee7ce6a5d4d0f6829c82a296b05f2 100644
--- a/test/es5conform/es5conform.status
+++ b/test/es5conform/es5conform.status
@@ -41,6 +41,16 @@ chapter10/10.4/10.4.2/10.4.2-2-c-1: FAIL_OK
 # We are compatible with Safari and Firefox.
 chapter11/11.1/11.1.5: UNIMPLEMENTED
 
+# We do not have a global object called 'global' as required by tests.
+chapter15/15.1: FAIL_OK
+
+# NaN is writable. We are compatible with JSC.
+chapter15/15.2/15.2.3/15.2.3.3/15.2.3.3-4-178: FAIL_OK
+# Infinity is writable. We are compatible with JSC.
+chapter15/15.2/15.2.3/15.2.3.3/15.2.3.3-4-179: FAIL_OK
+# undefined is writable. We are compatible with JSC.
+chapter15/15.2/15.2.3/15.2.3.3/15.2.3.3-4-180: FAIL_OK
+
 # Our Function object has an "arguments" property which is used as a
 # non-property in the test.
 chapter15/15.2/15.2.3/15.2.3.3/15.2.3.3-4-183: FAIL_OK