Reland: Take 2: Force python test server output to be unbuffered, so it doesn't mix with gtest outpu

net/tools/testserver/run_testserver.cc

Index: net/tools/testserver/run_testserver.cc
diff --git a/net/tools/testserver/run_testserver.cc b/net/tools/testserver/run_testserver.cc
index c02d4d6e18290ee6ea016f4e8998fba16db6215e..725c25be9b51260a1ff5e7f92781ed3af4ecfaa2 100644
--- a/net/tools/testserver/run_testserver.cc
+++ b/net/tools/testserver/run_testserver.cc
@@ -40,13 +40,13 @@ static bool RunSyncTest() {
 
   sync_test_path =
       sync_test_path.Append(FILE_PATH_LITERAL("chromiumsync_test.py"));
-  FilePath python_runtime;
-  if (!GetPythonRunTime(&python_runtime)) {
+
+  CommandLine python_command(CommandLine::NO_PROGRAM);
+  if (!GetPythonRunTime(&python_command)) {
     LOG(ERROR) << "Could not get python runtime command.";
     return false;
   }
 
-  CommandLine python_command(python_runtime);
   python_command.AppendArgPath(sync_test_path);
   if (!base::LaunchProcess(python_command, base::LaunchOptions(), NULL)) {
     LOG(ERROR) << "Failed to launch test script.";