Stop using third_party\python_26 for many tests.

net/test/spawned_test_server/local_test_server_win.cc

Index: net/test/spawned_test_server/local_test_server_win.cc
diff --git a/net/test/spawned_test_server/local_test_server_win.cc b/net/test/spawned_test_server/local_test_server_win.cc
index 08d68f80bf23beabd2ea200bcaee67d007a3d6db..db0674283486e1c4a2684ee9a7a76cebd797b8e9 100644
--- a/net/test/spawned_test_server/local_test_server_win.cc
+++ b/net/test/spawned_test_server/local_test_server_win.cc
@@ -190,15 +190,6 @@ bool LocalTestServer::LaunchPython(const base::FilePath& testserver_path) {
     return false;
   }
 
-  // Add our internal python to the path so it can be used if there is
-  // no system python.
-  base::FilePath python_dir;
-  if (!PathService::Get(base::DIR_SOURCE_ROOT, &python_dir)) {
-    LOG(ERROR) << "Could not locate source root directory.";
-    return false;
-  }
-  python_dir = python_dir.AppendASCII("third_party").AppendASCII("python_26");
-  ScopedPath python_path(python_dir);
   base::LaunchOptions launch_options;
   launch_options.inherit_handles = true;
   launch_options.job_handle = job_handle_.Get();