[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/content_setting.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_RENDERER_CONTENT_SETTING_H_
 #define EXTENSIONS_RENDERER_CONTENT_SETTING_H_
 
 #include <string>
 
 #include "base/macros.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/argument_spec.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/argument_spec.h"
 #include "gin/wrappable.h"
 #include "v8/include/v8.h"
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 }
 
 namespace gin {
 class Arguments;
@@ skipping 59 matching lines @@
   // (since different settings can take a different type of argument depending
   // on the preference it manages).
   ArgumentSpec argument_spec_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSetting);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_CONTENT_SETTING_H_