Point to correct app test binary

tools/valgrind/chrome_tests.py

 #!/usr/bin/python
 # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # chrome_tests.py
 
 ''' Runs various chrome tests through valgrind_test.py.
 
 This file is a copy of ../purify/chrome_tests.py. Eventually, it would be nice
@@ skipping 241 matching lines @@
                             "--trace_children",
                             "--indirect"])
 
   def TestTestShell(self):
     return self.SimpleTest("webkit", "test_shell_tests")
 
   def TestUnit(self):
     return self.SimpleTest("chrome", "unit_tests")
 
   def TestApp(self):
-    return self.SimpleTest("chrome", "app_tests")
+    return self.SimpleTest("chrome", "app_unittests")
 
   def TestUI(self):
     return self.SimpleTest("chrome", "ui_tests",
                            valgrind_test_args=[
                             "--timeout=120000",
                             "--trace_children",
                             "--indirect"],
                            cmd_args=[
                             "--ui-test-timeout=120000",
                             "--ui-test-action-timeout=80000",
@@ skipping 148 matching lines @@
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret: return ret
   return 0
 
 
 if __name__ == "__main__":
   ret = _main(sys.argv)
   sys.exit(ret)