[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/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_
-
-#include "extensions/renderer/api_binding_hooks.h"
-#include "extensions/renderer/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();
-
-  // Allows custom implementations to return a different event object.
-  // Populates |event_out| and returns true if a custom implementation should
-  // be used, otherwise returns false.
-  virtual bool CreateCustomEvent(v8::Local<v8::Context> context,
-                                 const binding::RunJSFunctionSync& run_js_sync,
-                                 const std::string& event_name,
-                                 v8::Local<v8::Value>* event_out);
-
-  // Allows custom implementations to handle a given request.
-  virtual APIBindingHooks::RequestResult HandleRequest(
-      const std::string& method_name,
-      const APISignature* signature,
-      v8::Local<v8::Context> context,
-      std::vector<v8::Local<v8::Value>>* arguments,
-      const APITypeReferenceMap& refs);
-
-  // 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_