[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/event_bindings.h

 // Copyright 2014 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_EVENT_BINDINGS_H_
 #define EXTENSIONS_RENDERER_EVENT_BINDINGS_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 28 matching lines @@
                                      const EventFilteringInfo* filtering_info,
                                      ScriptContext* context);
 
  private:
   // JavaScript handler which forwards to AttachEvent().
   // args[0] forwards to |event_name|.
   void AttachEventHandler(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Attach an event name to an object.
   // |event_name| The name of the event to attach.
-  void AttachEvent(const std::string& event_name);
+  void AttachEvent(const std::string& event_name, bool supports_lazy_listeners);
 
   // JavaScript handler which forwards to DetachEvent().
   // args[0] forwards to |event_name|.
   // args[1] forwards to |is_manual|.
   void DetachEventHandler(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Detaches an event name from an object.
   // |event_name| The name of the event to stop listening to.
   // |is_manual| True if this detach was done by the user via removeListener()
   // as opposed to automatically during shutdown, in which case we should inform
   // the browser we are no longer interested in that event.
-  void DetachEvent(const std::string& event_name, bool is_manual);
+  void DetachEvent(const std::string& event_name, bool remove_lazy_listener);
 
   // MatcherID AttachFilteredEvent(string event_name, object filter)
   // |event_name| Name of the event to attach.
   // |filter| Which instances of the named event are we interested in.
   // returns the id assigned to the listener, which will be returned from calls
   // to MatchAgainstEventFilter where this listener matches.
   void AttachFilteredEvent(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // JavaScript handler which forwards to DetachFilteredEvent.
   // void DetachFilteredEvent(int id, bool manual)
   // args[0] forwards to |matcher_id|
   // args[1] forwards to |is_manual|
   void DetachFilteredEventHandler(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Detaches a filtered event. Unlike a normal event, a filtered event is
   // identified by a unique ID per filter, not its name.
   // |matcher_id| The ID of the filtered event.
   // |is_manual| false if this is part of the extension unload process where all
   // listeners are automatically detached.
-  void DetachFilteredEvent(int matcher_id, bool is_manual);
+  void DetachFilteredEvent(int matcher_id, bool remove_lazy_listener);
 
   void AttachUnmanagedEvent(const v8::FunctionCallbackInfo<v8::Value>& args);
   void DetachUnmanagedEvent(const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Called when our context, and therefore us, is invalidated. Run any cleanup.
   void OnInvalidated();
 
   // The associated message sender. Guaranteed to outlive this object.
   IPCMessageSender* const ipc_message_sender_;
 
   // The set of attached events and filtered events. Maintain these so that we
   // can detch them on unload.
   std::set<std::string> attached_event_names_;
   std::set<int> attached_matcher_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(EventBindings);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_EVENT_BINDINGS_H_