Add polling and audio check to copresence.

chrome/browser/extensions/api/copresence/copresence_api.cc

Index: chrome/browser/extensions/api/copresence/copresence_api.cc
diff --git a/chrome/browser/extensions/api/copresence/copresence_api.cc b/chrome/browser/extensions/api/copresence/copresence_api.cc
index 8fb4faccb7cd9e5e1a573105073ff8a42b1e3859..502fa4eae19f6f1a3af38a475d29ad351f0bd689 100644
--- a/chrome/browser/extensions/api/copresence/copresence_api.cc
+++ b/chrome/browser/extensions/api/copresence/copresence_api.cc
@@ -115,6 +115,21 @@ void CopresenceService::HandleMessages(
            << app_id << "\" for subscription \"" << subscription_id << "\"";
 }
 
+void CopresenceService::HandleStatusUpdate(
+    copresence::CopresenceStatus status) {
+  // Update all apps using copresence with the new status update.
+  for (const std::string& app_id : copresence_apps_) {
+    scoped_ptr<Event> event(
+        new Event(api::copresence::OnStatusUpdated::kEventName,
+                  api::copresence::OnStatusUpdated::Create(
+                      api::copresence::STATUS_AUDIOFAILED),
+                  browser_context_));
+    EventRouter::Get(browser_context_)
+        ->DispatchEventToExtension(app_id, event.Pass());
+    DVLOG(2) << "Sent Audio Failed status update to app_id: " << app_id;
+  }
+}
+
 net::URLRequestContextGetter* CopresenceService::GetRequestContext() const {
   return browser_context_->GetRequestContext();
 }
@@ -167,6 +182,7 @@ ExtensionFunction::ResponseAction CopresenceExecuteFunction::Run() {
     return RespondNow(Error(kInvalidOperationsMessage));
   }
 
+  service->copresence_apps().insert(extension_id());

[xiyuan, 2014/11/06 21:27:50]

When do we remove the app id from service?

[rkc, 2014/11/06 21:45:05]

I just realized that we don't need this code at all. We can just broadcast the
event to any apps that are listening for it.

Done.

   service->manager()->ExecuteReportRequest(
       request,
       extension_id(),