Move lazy event dispatching code out of EventRouter.

extensions/browser/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//extensions/features/features.gni")
 
 assert(enable_extensions)
 
 group("browser") {
@@ skipping 70 matching lines @@
     "error_map.h",
     "event_listener_map.cc",
     "event_listener_map.h",
     "event_page_tracker.h",
     "event_router.cc",
     "event_router.h",
     "event_router_factory.cc",
     "event_router_factory.h",
     "events/lazy_event_dispatch_util.cc",
     "events/lazy_event_dispatch_util.h",
+    "events/lazy_event_dispatcher.cc",
+    "events/lazy_event_dispatcher.h",
     "extension_api_frame_id_map.cc",
     "extension_api_frame_id_map.h",
     "extension_dialog_auto_confirm.cc",
     "extension_dialog_auto_confirm.h",
     "extension_error.cc",
     "extension_error.h",
     "extension_function.cc",
     "extension_function.h",
     "extension_function_dispatcher.cc",
     "extension_function_dispatcher.h",
@@ skipping 125 matching lines @@
     "image_loader_factory.h",
     "info_map.cc",
     "info_map.h",
     "install_flag.h",
     "io_thread_extension_message_filter.cc",
     "io_thread_extension_message_filter.h",
     "lazy_background_task_queue.cc",
     "lazy_background_task_queue.h",
     "lazy_background_task_queue_factory.cc",
     "lazy_background_task_queue_factory.h",
+    "lazy_context_id.cc",
+    "lazy_context_id.h",
     "load_monitoring_extension_host_queue.cc",
     "load_monitoring_extension_host_queue.h",
     "management_policy.cc",
     "management_policy.h",
     "mojo/keep_alive_impl.cc",
     "mojo/keep_alive_impl.h",
     "mojo/service_registration.cc",
     "mojo/service_registration.h",
     "notification_types.cc",
     "notification_types.h",
@@ skipping 323 matching lines @@
       "api/media_perception_private/media_perception_api_manager_unittest.cc",
       "api/webcam_private/visca_webcam_unittest.cc",
     ]
 
     deps += [
       "//chromeos:media_perception_proto",
       "//chromeos:test_support",
     ]
   }
 }