Set up the infrastructure for Extension event metrics.

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

 // 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.
 
 #include "chrome/browser/extensions/api/copresence/copresence_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/linked_ptr.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/copresence/chrome_whispernet_client.h"
@@ skipping 130 matching lines @@
     api_messages[m].reset(new api::copresence::Message);
     api_messages[m]->type = messages[m].type().type();
     api_messages[m]->payload.assign(messages[m].payload().begin(),
                                     messages[m].payload().end());
     DVLOG(2) << "Dispatching message of type " << api_messages[m]->type << ":\n"
              << messages[m].payload();
   }
 
   // Send the messages to the client app.
   scoped_ptr<Event> event(
-      new Event(OnMessagesReceived::kEventName,
+      new Event(events::UNKNOWN, OnMessagesReceived::kEventName,
                 OnMessagesReceived::Create(subscription_id, api_messages),
                 browser_context_));
   EventRouter::Get(browser_context_)
       ->DispatchEventToExtension(app_id, event.Pass());
   DVLOG(2) << "Passed " << api_messages.size() << " messages to app \""
            << app_id << "\" for subscription \"" << subscription_id << "\"";
 }
 
 void CopresenceService::HandleStatusUpdate(
     copresence::CopresenceStatus status) {
   DCHECK_EQ(copresence::AUDIO_FAIL, status);
   scoped_ptr<Event> event(
-      new Event(OnStatusUpdated::kEventName,
+      new Event(events::UNKNOWN, OnStatusUpdated::kEventName,
                 OnStatusUpdated::Create(api::copresence::STATUS_AUDIOFAILED),
                 browser_context_));
   EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
   DVLOG(2) << "Sent Audio Failed status update.";
 }
 
 net::URLRequestContextGetter* CopresenceService::GetRequestContext() const {
   return browser_context_->GetRequestContext();
 }
 
@@ skipping 119 matching lines @@
   scoped_ptr<SetAuthToken::Params> params(SetAuthToken::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   // The token may be set to empty, to clear it.
   CopresenceService::GetFactoryInstance()->Get(browser_context())
       ->set_auth_token(extension_id(), params->token);
   return RespondNow(NoArguments());
 }
 
 }  // namespace extensions