[Extensions Bindings] Move request dispatch to APIRequestHandler

extensions/renderer/api_bindings_system.h

 // Copyright 2016 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_BINDINGS_SYSTEM_H_
 #define EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 19 matching lines @@
 // for Extension APIs. Designed to be used on a single thread, but safe between
 // multiple v8::Contexts.
 class APIBindingsSystem {
  public:
   using GetAPISchemaMethod =
       base::Callback<const base::DictionaryValue&(const std::string&)>;
 
   APIBindingsSystem(const binding::RunJSFunction& call_js,
                     const binding::RunJSFunctionSync& call_js_sync,
                     const GetAPISchemaMethod& get_api_schema,
-                    const APIBinding::SendRequestMethod& send_request,
+                    const APIRequestHandler::SendRequestMethod& send_request,
                     const APIEventHandler::EventListenersChangedMethod&
                         event_listeners_changed,
                     APILastError last_error);
   ~APIBindingsSystem();
 
   // Returns a new v8::Object representing the api specified by |api_name|.
   v8::Local<v8::Object> CreateAPIInstance(
       const std::string& api_name,
       v8::Local<v8::Context> context,
       v8::Isolate* isolate,
@@ skipping 48 matching lines @@
   std::map<std::string, std::unique_ptr<APIBindingHooks>> binding_hooks_;
 
   binding::RunJSFunction call_js_;
 
   binding::RunJSFunctionSync call_js_sync_;
 
   // The method to retrieve the DictionaryValue describing a given extension
   // API. Curried in for testing purposes so we can use fake APIs.
   GetAPISchemaMethod get_api_schema_;
 
-  // The method to call when a new API call is triggered. Curried in for testing
-  // purposes. Typically, this would send an IPC to the browser to begin the
-  // function work.
-  APIBinding::SendRequestMethod send_request_;
-
   DISALLOW_COPY_AND_ASSIGN(APIBindingsSystem);
 };
 
 }  // namespace
 
 #endif  // EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_