tools/runtests.py: Fix cctests on Windows; properly return error code when there were Python exceptions

Review URL: https://codereview.chromium.org/11929020

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13430 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/testcfg.py

@@ -45,9 +45,9 @@ class CcTestSuite(testsuite.TestSuite):
     os.makedirs(self.serdes_dir)
 
   def ListTests(self, context):
+    shell = os.path.abspath(os.path.join(context.shell_dir, self.shell()))
     if utils.IsWindows():
       shell += '.exe'
-    shell = os.path.abspath(os.path.join(context.shell_dir, self.shell()))
     output = commands.Execute([context.command_prefix,
                                shell,
                                '--list',

tools/testrunner/local/execution.py

@@ -90,7 +90,7 @@ class Runner(object):
     self.indicator.Starting()
     self._RunInternal(jobs)
     self.indicator.Done()
-    if self.failed:
+    if self.failed or self.remaining:
       return 1
     return 0