[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/argument_spec.cc

Index: extensions/renderer/bindings/argument_spec.cc
diff --git a/extensions/renderer/argument_spec.cc b/extensions/renderer/bindings/argument_spec.cc
similarity index 99%
rename from extensions/renderer/argument_spec.cc
rename to extensions/renderer/bindings/argument_spec.cc
index 1ecb1dadcdc3162f3a4f1337245a244f7edae2e6..cd105bff336f5b4285611f25b0bf4edec412c4d1 100644
--- a/extensions/renderer/argument_spec.cc
+++ b/extensions/renderer/bindings/argument_spec.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/argument_spec.h"
+#include "extensions/renderer/bindings/argument_spec.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_piece.h"
@@ -10,8 +10,8 @@
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "content/public/child/v8_value_converter.h"
-#include "extensions/renderer/api_invocation_errors.h"
-#include "extensions/renderer/api_type_reference_map.h"
+#include "extensions/renderer/bindings/api_invocation_errors.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
 #include "gin/converter.h"
 #include "gin/dictionary.h"