Make the message test suite run without slow asserts.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/39303004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17381 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/message/testcfg.py

@@ -35,6 +35,7 @@ from testrunner.objects import testcase
 
 
 FLAGS_PATTERN = re.compile(r"//\s+Flags:(.*)")
+INVALID_FLAGS = ["--enable-slow-asserts"]
 
 
 class MessageTestSuite(testsuite.TestSuite):
@@ -62,6 +63,7 @@ class MessageTestSuite(testsuite.TestSuite):
     for match in flags_match:
       result += match.strip().split()
     result += context.mode_flags
+    result = [x for x in result if x not in INVALID_FLAGS]
     result.append(os.path.join(self.root, testcase.path + ".js"))
     return testcase.flags + result