Fix glog includes and include sorting order.

Change-Id: I0ec85218e82d1714279d41f7635104d480fb91c3
diff --git a/internal/ceres/gradient_checking_cost_function.cc b/internal/ceres/gradient_checking_cost_function.cc
index abba408..7fb3ed7 100644
--- a/internal/ceres/gradient_checking_cost_function.cc
+++ b/internal/ceres/gradient_checking_cost_function.cc
@@ -36,18 +36,18 @@
 #include <string>
 #include <vector>
 
-#include <glog/logging.h>
+#include "ceres/cost_function.h"
+#include "ceres/internal/eigen.h"
+#include "ceres/internal/scoped_ptr.h"
 #include "ceres/parameter_block.h"
+#include "ceres/problem.h"
 #include "ceres/problem_impl.h"
 #include "ceres/program.h"
 #include "ceres/residual_block.h"
 #include "ceres/runtime_numeric_diff_cost_function.h"
 #include "ceres/stringprintf.h"
-#include "ceres/cost_function.h"
-#include "ceres/internal/eigen.h"
-#include "ceres/internal/scoped_ptr.h"
-#include "ceres/problem.h"
 #include "ceres/types.h"
+#include "glog/logging.h"
 
 namespace ceres {
 namespace internal {