Set up the infrastructure for Extension event metrics.

extensions/browser/api/audio/audio_api.cc

 // Copyright (c) 2013 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 "extensions/browser/api/audio/audio_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/values.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/common/api/audio.h"
@@ skipping 20 matching lines @@
   delete service_;
   service_ = NULL;
 }
 
 AudioService* AudioAPI::GetService() const {
   return service_;
 }
 
 void AudioAPI::OnDeviceChanged() {
   if (EventRouter::Get(browser_context_)) {
-    scoped_ptr<Event> event(new Event(
-        audio::OnDeviceChanged::kEventName,
-        scoped_ptr<base::ListValue>(new base::ListValue())));
+    scoped_ptr<Event> event(
+        new Event(events::UNKNOWN, audio::OnDeviceChanged::kEventName,
+                  scoped_ptr<base::ListValue>(new base::ListValue())));
     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
   }
 }
 
 void AudioAPI::OnLevelChanged(const std::string& id, int level) {
   if (EventRouter::Get(browser_context_)) {
     scoped_ptr<base::ListValue> args = audio::OnLevelChanged::Create(id, level);
-    scoped_ptr<Event> event(
-        new Event(audio::OnLevelChanged::kEventName, args.Pass()));
+    scoped_ptr<Event> event(new Event(
+        events::UNKNOWN, audio::OnLevelChanged::kEventName, args.Pass()));
     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
   }
 }
 
 void AudioAPI::OnMuteChanged(bool is_input, bool is_muted) {
   if (EventRouter::Get(browser_context_)) {
     scoped_ptr<base::ListValue> args =
         audio::OnMuteChanged::Create(is_input, is_muted);
-    scoped_ptr<Event> event(
-        new Event(audio::OnMuteChanged::kEventName, args.Pass()));
+    scoped_ptr<Event> event(new Event(
+        events::UNKNOWN, audio::OnMuteChanged::kEventName, args.Pass()));
     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
   }
 }
 
 void AudioAPI::OnDevicesChanged(const DeviceInfoList& devices) {
   if (EventRouter::Get(browser_context_)) {
     scoped_ptr<base::ListValue> args = audio::OnDevicesChanged::Create(devices);
-    scoped_ptr<Event> event(
-        new Event(audio::OnDevicesChanged::kEventName, args.Pass()));
+    scoped_ptr<Event> event(new Event(
+        events::UNKNOWN, audio::OnDevicesChanged::kEventName, args.Pass()));
     EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool AudioGetInfoFunction::RunAsync() {
   AudioService* service =
       AudioAPI::GetFactoryInstance()->Get(browser_context())->GetService();
   DCHECK(service);
@@ skipping 49 matching lines @@
                                     volume_value,
                                     gain_value))
     return false;
   else
     return true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 }  // namespace extensions