Add "run_testserver --sync-test" for easy chromiumsync_test.py launching.

net/test/local_test_server_posix.cc

Index: net/test/local_test_server_posix.cc
diff --git a/net/test/local_test_server_posix.cc b/net/test/local_test_server_posix.cc
index 0cb4857f7148dde3eabf97b5fb867d6f95528571..3756b69f4395974dd68a4246a2d105d519ddc501 100644
--- a/net/test/local_test_server_posix.cc
+++ b/net/test/local_test_server_posix.cc
@@ -15,6 +15,7 @@
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/test/test_timeouts.h"
+#include "net/test/python_utils.h"
 
 namespace {
 
@@ -94,7 +95,12 @@ bool ReadData(int fd, ssize_t bytes_max, uint8* buffer,
 namespace net {
 
 bool LocalTestServer::LaunchPython(const FilePath& testserver_path) {
+  // Log is useful in the event you want to run a nearby script (e.g. a test) in
+  // the same environment as the TestServer.
+  VLOG(1) << "LaunchPython called with PYTHONPATH = " <<
+          getenv(kPythonPathEnv);
   CommandLine python_command(FilePath(FILE_PATH_LITERAL("python")));
+
   python_command.AppendArgPath(testserver_path);
   if (!AddCommandLineArguments(&python_command))
     return false;