Add the basic code skeleton for system info event router

chrome/browser/extensions/event_router.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/event_router.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/runtime/runtime_api.h"
 #include "chrome/browser/extensions/api/web_request/web_request_api.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_processes_api.h"
 #include "chrome/browser/extensions/extension_processes_api_constants.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
+#include "chrome/browser/extensions/event_names.h"
 #include "chrome/browser/extensions/lazy_background_task_queue.h"
 #include "chrome/browser/extensions/process_map.h"
+#include "chrome/browser/extensions/system_info_event_router.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_messages.h"
 #include "chrome/common/extensions/api/extension_api.h"
 #include "chrome/common/view_type.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 119 matching lines @@
     extension_devtools_manager_->AddEventListener(listener->event_name,
                                                   listener->process->GetID());
 
   // We lazily tell the TaskManager to start updating when listeners to the
   // processes.onUpdated or processes.onUpdatedWithMemory events arrive.
   const std::string& event_name = listener->event_name;
   if (event_name.compare(extension_processes_api_constants::kOnUpdated) == 0 ||
       event_name.compare(
           extension_processes_api_constants::kOnUpdatedWithMemory) == 0)
     ExtensionProcessesEventRouter::GetInstance()->ListenerAdded();
+
+  if (event_name.compare(
+          event_names::kOnStorageAvailableCapacityChanged) == 0 ||

[Mihai Parparita -not on Chrome, 2012/08/23 00:45:52]

You may want to encapsulate this in a
SystemInfoEvent::IsSystemInfoEvent(event_name) method, so that this class
doesn't have to be touched every time a new event is added.

+      event_name.compare(event_names::kOnStorageAdded) == 0 ||
+      event_name.compare(event_names::kOnStorageRemoved) == 0)
+    SystemInfoEventRouter::GetInstance()->AddEventListener(profile_,
+                                                           event_name);
 }
 
 void EventRouter::OnListenerRemoved(const EventListener* listener) {
   // We don't care about lazy events being removed.
   if (!listener->process)
     return;
 
   const std::string& event_name = listener->event_name;
   if (extension_devtools_manager_.get())
     extension_devtools_manager_->RemoveEventListener(
@@ skipping 430 matching lines @@
       event_args(event_args.Pass()),
       event_url(event_url),
       restrict_to_profile(restrict_to_profile),
       cross_incognito_args(NULL),
       user_gesture(user_gesture),
       info(info) {}
 
 Event::~Event() {}
 
 }  // namespace extensions