Set up the infrastructure for Extension event metrics.

chrome/browser/extensions/api/activity_log_private/activity_log_private_api.cc

 // Copyright 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/extensions/api/activity_log_private/activity_log_private_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
@@ skipping 69 matching lines @@
 
 void ActivityLogAPI::OnListenerRemoved(const EventListenerInfo& details) {
   // TODO(felt): Only observe activity_log_ events when we have a customer.
 }
 
 void ActivityLogAPI::OnExtensionActivity(scoped_refptr<Action> activity) {
   scoped_ptr<base::ListValue> value(new base::ListValue());
   scoped_ptr<ExtensionActivity> activity_arg =
       activity->ConvertToExtensionActivity();
   value->Append(activity_arg->ToValue().release());
-  scoped_ptr<Event> event(
-      new Event(activity_log_private::OnExtensionActivity::kEventName,
-          value.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, activity_log_private::OnExtensionActivity::kEventName,
+      value.Pass()));
   event->restrict_to_browser_context = browser_context_;
   EventRouter::Get(browser_context_)->BroadcastEvent(event.Pass());
 }
 
 bool ActivityLogPrivateGetExtensionActivitiesFunction::RunAsync() {
   scoped_ptr<activity_log_private::GetExtensionActivities::Params> params(
       activity_log_private::GetExtensionActivities::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
   // Get the arguments in the right format.
@@ skipping 112 matching lines @@
     gurls.push_back(GURL(*it));
   }
 
   ActivityLog* activity_log = ActivityLog::GetInstance(GetProfile());
   DCHECK(activity_log);
   activity_log->RemoveURLs(gurls);
   return true;
 }
 
 }  // namespace extensions