Refactor the tools/test.py script and related testcfg.py files....

test/cctest/testcfg.py

Index: test/cctest/testcfg.py
===================================================================
--- test/cctest/testcfg.py	(revision 5302)
+++ test/cctest/testcfg.py	(working copy)
@@ -31,15 +31,12 @@
 import platform
 import utils
 
-CCTEST_DEBUG_FLAGS = ['--enable-slow-asserts', '--debug-code', '--verify-heap']
 
-
 class CcTestCase(test.TestCase):
 
   def __init__(self, path, executable, mode, raw_name, dependency, context):
-    super(CcTestCase, self).__init__(context, path)
+    super(CcTestCase, self).__init__(context, path, mode)
     self.executable = executable
-    self.mode = mode
     self.raw_name = raw_name
     self.dependency = dependency
 
@@ -54,8 +51,7 @@
     serialization_file += '_' + self.GetName()
     serialization_option = '--testing_serialization_file=' + serialization_file
     result = [ self.executable, name, serialization_option ]
-    if self.mode == 'debug':
-      result += CCTEST_DEBUG_FLAGS
+    result += self.context.GetVmFlags(self, self.mode)
     return result
 
   def GetCommand(self):