[Extensions Bindings] Add Events support

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>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "extensions/renderer/api_binding.h"
+#include "extensions/renderer/api_binding_types.h"
+#include "extensions/renderer/api_event_handler.h"
 #include "extensions/renderer/api_request_handler.h"
 #include "extensions/renderer/argument_spec.h"
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 }
 
 namespace extensions {
 class APIRequestHandler;
@@ skipping 11 matching lines @@
 
     std::string request_id;
     std::string method_name;
     std::unique_ptr<base::ListValue> arguments;
   };
 
   using GetAPISchemaMethod =
       base::Callback<const base::DictionaryValue&(const std::string&)>;
   using SendRequestMethod = base::Callback<void(std::unique_ptr<Request>)>;
 
-  APIBindingsSystem(const APIRequestHandler::CallJSFunction& call_js,
+  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);
 
   // Responds to the request with the given |request_id|, calling the callback
   // with |response|.
   void CompleteRequest(const std::string& 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);
+
  private:
   // Creates a new APIBinding for the given |api_name|.
   std::unique_ptr<APIBinding> CreateNewAPIBinding(const std::string& api_name);
 
   // Handles a call into an API, adds a pending request to the
   // |request_handler_|, and calls |send_request_|.
   void OnAPICall(const std::string& name,
                  std::unique_ptr<base::ListValue> arguments,
                  v8::Isolate* isolate,
                  v8::Local<v8::Context> context,
                  v8::Local<v8::Function> callback);
 
   // The map of cached API reference types.
   ArgumentSpec::RefMap type_reference_map_;
 
   // The request handler associated with the system.
   APIRequestHandler request_handler_;
 
+  // The event handler associated with the system.
+  APIEventHandler event_handler_;
+
   // A map from api_name -> APIBinding for constructed APIs. APIBindings are
   // created lazily.
   std::map<std::string, std::unique_ptr<APIBinding>> api_bindings_;
 
   // 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.
   SendRequestMethod send_request_;
 
   DISALLOW_COPY_AND_ASSIGN(APIBindingsSystem);
 };
 
 }  // namespace
 
 #endif  // EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_