Set up the infrastructure for Extension event metrics.

chrome/browser/chromeos/accessibility/accessibility_manager.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 "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 
 #include "ash/audio/sounds.h"
 #include "ash/autoclick/autoclick_controller.h"
 #include "ash/high_contrast/high_contrast_controller.h"
 #include "ash/metrics/user_metrics_recorder.h"
@@ skipping 1089 matching lines @@
   if (system_sounds_enabled_)
     ash::PlaySystemSoundAlways(SOUND_SPOKEN_FEEDBACK_ENABLED);
 
   if (chrome_vox_loaded_on_lock_screen_ ||
       should_speak_chrome_vox_announcements_on_user_screen_) {
     extensions::EventRouter* event_router =
         extensions::EventRouter::Get(profile);
     CHECK(event_router);
 
     scoped_ptr<base::ListValue> event_args(new base::ListValue());
-    scoped_ptr<extensions::Event> event(
-        new extensions::Event(extensions::api::accessibility_private::
-                                  OnIntroduceChromeVox::kEventName,
-                              event_args.Pass()));
+    scoped_ptr<extensions::Event> event(new extensions::Event(
+        extensions::events::UNKNOWN, extensions::api::accessibility_private::
+                                         OnIntroduceChromeVox::kEventName,
+        event_args.Pass()));
     event_router->DispatchEventWithLazyListener(
         extension_misc::kChromeVoxExtensionId, event.Pass());
   }
 
   should_speak_chrome_vox_announcements_on_user_screen_ =
       chrome_vox_loaded_on_lock_screen_;
 }
 
 void AccessibilityManager::PostUnloadChromeVox(Profile* profile) {
   // Do any teardown work needed immediately after ChromeVox actually unloads.
   if (system_sounds_enabled_)
     ash::PlaySystemSoundAlways(SOUND_SPOKEN_FEEDBACK_DISABLED);
   // Clear the accessibility focus ring.
   AccessibilityFocusRingController::GetInstance()->SetFocusRing(
       std::vector<gfx::Rect>());
 }
 
 }  // namespace chromeos