[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_last_error_unittest.cc

Index: extensions/renderer/bindings/api_last_error_unittest.cc
diff --git a/extensions/renderer/api_last_error_unittest.cc b/extensions/renderer/bindings/api_last_error_unittest.cc
similarity index 98%
rename from extensions/renderer/api_last_error_unittest.cc
rename to extensions/renderer/bindings/api_last_error_unittest.cc
index dbe8ff2ce7e92c463c33630a8a73c4c01182972d..09f42aacef405baa58460230b6a5f57f5fbe3f7d 100644
--- a/extensions/renderer/api_last_error_unittest.cc
+++ b/extensions/renderer/bindings/api_last_error_unittest.cc
@@ -2,13 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/api_last_error.h"
+#include "extensions/renderer/bindings/api_last_error.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/optional.h"
-#include "extensions/renderer/api_binding_test.h"
-#include "extensions/renderer/api_binding_test_util.h"
+#include "extensions/renderer/bindings/api_binding_test.h"
+#include "extensions/renderer/bindings/api_binding_test_util.h"
 #include "gin/converter.h"
 #include "gin/public/context_holder.h"