Enable the use of system python in testing.

net/test/python_utils.cc

Index: net/test/python_utils.cc
diff --git a/net/test/python_utils.cc b/net/test/python_utils.cc
index 483aed7080a18eac8eb9dceea1c4696f6c8ee649..b9963c59a36cd9dae2548f2956d334edb627aebf 100644
--- a/net/test/python_utils.cc
+++ b/net/test/python_utils.cc
@@ -108,11 +108,15 @@ bool GetPythonCommand(CommandLine* python_cmd) {
   DCHECK(python_cmd);
   base::FilePath dir;
 #if defined(OS_WIN)
+#if defined(USE_SYSTEM_PYTHON_IN_TESTS)
+  dir = base::FilePath(FILE_PATH_LITERAL("python.exe"));

[Paweł Hajdan Jr., 2013/06/03 18:28:20]

Could you explain more how and why you're using this?

Note that on Windows there is no real concept of "system" programs or libraries
(except ones that come from Microsoft).

+#else
   if (!PathService::Get(base::DIR_SOURCE_ROOT, &dir))
     return false;
   dir = dir.Append(FILE_PATH_LITERAL("third_party"))
            .Append(FILE_PATH_LITERAL("python_26"))
            .Append(FILE_PATH_LITERAL("python.exe"));
+#endif  // USE_SYSTEM_PYTHON_IN_TESTS
 #elif defined(OS_POSIX)
   dir = base::FilePath("python");
 #endif