Remove using namespace std;
For historical reasons we had a "using namespace std;" in port.h. This
is generally a bad idea. So removing it and along the way doing a bunch
of cpplint cleanup.
Change-Id: Ia125601a55ae62695e247fb0250df4c6f86c46c6
diff --git a/internal/ceres/residual_block_test.cc b/internal/ceres/residual_block_test.cc
index b37f50f..22873e7 100644
--- a/internal/ceres/residual_block_test.cc
+++ b/internal/ceres/residual_block_test.cc
@@ -39,6 +39,8 @@
namespace ceres {
namespace internal {
+using std::vector;
+
// Trivial cost function that accepts three arguments.
class TernaryCostFunction: public CostFunction {
public:
