[Extensions Bindings] Add Events support

extensions/renderer/api_bindings_system.cc

 // 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.
 
 #include "extensions/renderer/api_bindings_system.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 
 namespace extensions {
 
 APIBindingsSystem::Request::Request() {}
 APIBindingsSystem::Request::~Request() {}
 
-APIBindingsSystem::APIBindingsSystem(
-    const APIRequestHandler::CallJSFunction& call_js,
-    const GetAPISchemaMethod& get_api_schema,
-    const SendRequestMethod& send_request)
+APIBindingsSystem::APIBindingsSystem(const binding::RunJSFunction& call_js,
+                                     const GetAPISchemaMethod& get_api_schema,
+                                     const SendRequestMethod& send_request)
     : request_handler_(call_js),
+      event_handler_(call_js),
       get_api_schema_(get_api_schema),
       send_request_(send_request) {}
 
 APIBindingsSystem::~APIBindingsSystem() {}
 
 v8::Local<v8::Object> APIBindingsSystem::CreateAPIInstance(
     const std::string& api_name,
     v8::Local<v8::Context> context,
     v8::Isolate* isolate,
     const APIBinding::AvailabilityCallback& is_available) {
   std::unique_ptr<APIBinding>& binding = api_bindings_[api_name];
   if (!binding)
     binding = CreateNewAPIBinding(api_name);
-  return binding->CreateInstance(context, isolate, is_available);
+  return binding->CreateInstance(
+      context, isolate, &event_handler_, is_available);
 }
 
 std::unique_ptr<APIBinding> APIBindingsSystem::CreateNewAPIBinding(
     const std::string& api_name) {
   const base::DictionaryValue& api_schema = get_api_schema_.Run(api_name);
 
   const base::ListValue* function_definitions = nullptr;
   CHECK(api_schema.GetList("functions", &function_definitions));
   const base::ListValue* type_definitions = nullptr;
   // Type definitions might not exist for the given API.
   api_schema.GetList("types", &type_definitions);
+  const base::ListValue* event_definitions = nullptr;
+  api_schema.GetList("events", &event_definitions);
 
   return base::MakeUnique<APIBinding>(
-      api_name, *function_definitions, type_definitions,
+      api_name, *function_definitions, type_definitions, event_definitions,
       base::Bind(&APIBindingsSystem::OnAPICall, base::Unretained(this)),
       &type_reference_map_);
 }
 
 void APIBindingsSystem::CompleteRequest(const std::string& request_id,
                                         const base::ListValue& response) {
   request_handler_.CompleteRequest(request_id, response);
 }
 
+void APIBindingsSystem::FireEventInContext(const std::string& event_name,
+                                           v8::Local<v8::Context> context,
+                                           const base::ListValue& response) {
+  event_handler_.FireEventInContext(event_name, context, response);
+}
+
 void APIBindingsSystem::OnAPICall(const std::string& name,
                                   std::unique_ptr<base::ListValue> arguments,
                                   v8::Isolate* isolate,
                                   v8::Local<v8::Context> context,
                                   v8::Local<v8::Function> callback) {
   auto request = base::MakeUnique<Request>();
   if (!callback.IsEmpty()) {
     request->request_id =
         request_handler_.AddPendingRequest(isolate, callback, context);
   }
   request->arguments = std::move(arguments);
   request->method_name = name;
 
   send_request_.Run(std::move(request));
 }
 
 }  // namespace extensions