[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_binding_hooks_delegate.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_API_BINDING_HOOKS_DELEGATE_H_
-#define EXTENSIONS_RENDERER_API_BINDING_HOOKS_DELEGATE_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_BINDING_HOOKS_DELEGATE_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_BINDING_HOOKS_DELEGATE_H_
 
-#include "extensions/renderer/api_binding_hooks.h"
-#include "extensions/renderer/api_binding_types.h"
+#include "extensions/renderer/bindings/api_binding_hooks.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 class APITypeReferenceMap;
 
 // A per-API set of custom hooks to override the default behavior.
 class APIBindingHooksDelegate {
  public:
   virtual ~APIBindingHooksDelegate();
 
@@ skipping 15 matching lines @@
 
   // Allows custom implementations to add additional properties or types to an
   // API object.
   virtual void InitializeTemplate(v8::Isolate* isolate,
                                   v8::Local<v8::ObjectTemplate> object_template,
                                   const APITypeReferenceMap& type_refs) {}
 };
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_BINDING_HOOKS_DELEGATE_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_BINDING_HOOKS_DELEGATE_H_