[Extensions Bindings] Add a bridge to use current custom bindings

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 40 matching lines @@
   APIBindingsSystem(const binding::RunJSFunction& call_js,
                     const GetAPISchemaMethod& get_api_schema,
                     const SendRequestMethod& send_request);
   ~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,
-      const APIBinding::AvailabilityCallback& is_available);
+      const APIBinding::AvailabilityCallback& is_available,
+      v8::Local<v8::Object>* hooks_interface_out);

[Devlin, 2016/12/16 01:55:49]

I don't particularly love this interface, but unfortunately our current bindings
rely on having the API object ready as well (even though they perhaps
shouldn't).  This was the cleanest way I could find overall, and it seems to
keep everything minimally intrusive.  But I'm open to other suggestions. :)

 
   // Responds to the request with the given |request_id|, calling the callback
   // with |response|.
   void CompleteRequest(int request_id, const base::ListValue& response);
 
   // Notifies the APIEventHandler to fire the corresponding event, notifying
   // listeners.
   void FireEventInContext(const std::string& event_name,
                           v8::Local<v8::Context> context,
                           const base::ListValue& response);
@@ skipping 47 matching lines @@
   // purposes. Typically, this would send an IPC to the browser to begin the
   // function work.
   SendRequestMethod send_request_;
 
   DISALLOW_COPY_AND_ASSIGN(APIBindingsSystem);
 };
 
 }  // namespace
 
 #endif  // EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_