[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_request_handler_unittest.cc

Index: extensions/renderer/bindings/api_request_handler_unittest.cc
diff --git a/extensions/renderer/api_request_handler_unittest.cc b/extensions/renderer/bindings/api_request_handler_unittest.cc
similarity index 99%
rename from extensions/renderer/api_request_handler_unittest.cc
rename to extensions/renderer/bindings/api_request_handler_unittest.cc
index e646a981163bd106034995ba0c2c63c397d11a65..ffe963b8d71681686585a410b7a7027f58189069 100644
--- a/extensions/renderer/api_request_handler_unittest.cc
+++ b/extensions/renderer/bindings/api_request_handler_unittest.cc
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/api_request_handler.h"
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.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 "extensions/renderer/bindings/api_request_handler.h"
 #include "gin/converter.h"
 #include "gin/function_template.h"
 #include "gin/public/context_holder.h"