[Reland][Extensions Bindings] Add support for filtered events

extensions/renderer/api_binding_js_util.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_JS_UTIL_H_
 #define EXTENSIONS_RENDERER_API_BINDING_JS_UTIL_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 33 matching lines @@
                    const std::vector<v8::Local<v8::Value>>& request_args);
 
   // A handler to register an argument massager for a specific event.
   // Replacement for event_bindings.registerArgumentMassager.
   void RegisterEventArgumentMassager(gin::Arguments* arguments,
                                      const std::string& event_name,
                                      v8::Local<v8::Function> massager);
 
   // A handler to allow custom bindings to create custom extension API event
   // objects (e.g. foo.onBar).
-  // TODO(devlin): Currently, we ignore schema and options. We'll need to take
-  // at least options into account.
+  // Note: The JS version allows for constructing declarative events; it's
+  // unclear if we'll need to support this.
+  // TODO(devlin): Currently, we ignore schema. We may want to take it into
+  // account.
   void CreateCustomEvent(gin::Arguments* arguments,
                          v8::Local<v8::Value> v8_event_name,
                          v8::Local<v8::Value> unused_schema,
-                         v8::Local<v8::Value> unused_event_options);
+                         bool supports_filters);
 
   // Invalidates an event, removing its listeners and preventing any more from
   // being added.
   void InvalidateEvent(gin::Arguments* arguments, v8::Local<v8::Object> event);
 
   // Type references. Guaranteed to outlive this object.
   const APITypeReferenceMap* type_refs_;
 
   // The request handler. Guaranteed to outlive this object.
   APIRequestHandler* request_handler_;
 
   // The event handler. Guaranteed to outlive this object.
   APIEventHandler* event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(APIBindingJSUtil);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_BINDING_JS_UTIL_H_