Set up the infrastructure for Extension event metrics.

extensions/browser/api/app_runtime/app_runtime_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 "extensions/browser/api/app_runtime/app_runtime_api.h"
 
 #include "base/metrics/histogram.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "extensions/browser/event_router.h"
@@ skipping 12 matching lines @@
 namespace app_runtime = core_api::app_runtime;
 
 namespace {
 
 void DispatchOnEmbedRequestedEventImpl(
     const std::string& extension_id,
     scoped_ptr<base::DictionaryValue> app_embedding_request_data,
     content::BrowserContext* context) {
   scoped_ptr<base::ListValue> args(new base::ListValue());
   args->Append(app_embedding_request_data.release());
-  scoped_ptr<Event> event(
-      new Event(app_runtime::OnEmbedRequested::kEventName, args.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, app_runtime::OnEmbedRequested::kEventName, args.Pass()));
   event->restrict_to_browser_context = context;
   EventRouter::Get(context)
       ->DispatchEventWithLazyListener(extension_id, event.Pass());
 
   ExtensionPrefs::Get(context)
       ->SetLastLaunchTime(extension_id, base::Time::Now());
 }
 
 void DispatchOnLaunchedEventImpl(const std::string& extension_id,
                                  app_runtime::LaunchSource source,
                                  scoped_ptr<base::DictionaryValue> launch_data,
                                  BrowserContext* context) {
   UMA_HISTOGRAM_ENUMERATION(
       "Extensions.AppLaunchSource", source, NUM_APP_LAUNCH_SOURCES);
 
   // "Forced app mode" is true for Chrome OS kiosk mode.
   launch_data->SetBoolean(
       "isKioskSession",
       ExtensionsBrowserClient::Get()->IsRunningInForcedAppMode());
   scoped_ptr<base::ListValue> args(new base::ListValue());
   args->Append(launch_data.release());
-  scoped_ptr<Event> event(
-      new Event(app_runtime::OnLaunched::kEventName, args.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, app_runtime::OnLaunched::kEventName, args.Pass()));
   event->restrict_to_browser_context = context;
   EventRouter::Get(context)
       ->DispatchEventWithLazyListener(extension_id, event.Pass());
   ExtensionPrefs::Get(context)
       ->SetLastLaunchTime(extension_id, base::Time::Now());
 }
 
 app_runtime::LaunchSource getLaunchSourceEnum(
     extensions::AppLaunchSource source) {
   switch (source) {
@@ skipping 63 matching lines @@
   }
   DispatchOnLaunchedEventImpl(
       extension->id(), source_enum, launch_data.ToValue().Pass(), context);
 }
 
 // static
 void AppRuntimeEventRouter::DispatchOnRestartedEvent(
     BrowserContext* context,
     const Extension* extension) {
   scoped_ptr<base::ListValue> arguments(new base::ListValue());
-  scoped_ptr<Event> event(
-      new Event(app_runtime::OnRestarted::kEventName, arguments.Pass()));
+  scoped_ptr<Event> event(new Event(
+      events::UNKNOWN, app_runtime::OnRestarted::kEventName, arguments.Pass()));
   event->restrict_to_browser_context = context;
   EventRouter::Get(context)
       ->DispatchEventToExtension(extension->id(), event.Pass());
 }
 
 // static
 void AppRuntimeEventRouter::DispatchOnLaunchedEventWithFileEntries(
     BrowserContext* context,
     const Extension* extension,
     const std::string& handler_id,
@@ skipping 40 matching lines @@
   launch_data.url.reset(new std::string(url.spec()));
   launch_data.referrer_url.reset(new std::string(referrer_url.spec()));
   if (extensions::FeatureSwitch::trace_app_source()->IsEnabled()) {
     launch_data.source = source_enum;
   }
   DispatchOnLaunchedEventImpl(
       extension->id(), source_enum, launch_data.ToValue().Pass(), context);
 }
 
 }  // namespace extensions