Set up the infrastructure for Extension event metrics.

chrome/browser/chromeos/extensions/dictionary_event_router.cc

 // Copyright (c) 2015 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/extensions/dictionary_event_router.h"
 
 #include <string>
 
 #include "base/json/json_writer.h"
 #include "base/values.h"
@@ skipping 28 matching lines @@
 
   extensions::EventRouter* router = extensions::EventRouter::Get(context_);
   if (!router->HasEventListener(
       extensions::InputMethodAPI::kOnDictionaryLoaded)) {
     return;
   }
 
   scoped_ptr<base::ListValue> args(new base::ListValue());
   // The router will only send the event to extensions that are listening.
   scoped_ptr<extensions::Event> event(new extensions::Event(
+      extensions::events::UNKNOWN,
       extensions::InputMethodAPI::kOnDictionaryLoaded, args.Pass()));
   event->restrict_to_browser_context = context_;
   router->BroadcastEvent(event.Pass());
 }
 
 void ExtensionDictionaryEventRouter::OnCustomDictionaryLoaded() {
   loaded_ = true;
   DispatchLoadedEventIfLoaded();
 }
 
@@ skipping 13 matching lines @@
   scoped_ptr<base::ListValue> removed_words(new base::ListValue());
   for (const std::string& word : dictionary_change.to_remove())
     removed_words->AppendString(word);
 
   scoped_ptr<base::ListValue> args(new base::ListValue());
   args->Append(added_words.release());
   args->Append(removed_words.release());
 
   // The router will only send the event to extensions that are listening.
   scoped_ptr<extensions::Event> event(new extensions::Event(
+      extensions::events::UNKNOWN,
       extensions::InputMethodAPI::kOnDictionaryChanged, args.Pass()));
   event->restrict_to_browser_context = context_;
   router->BroadcastEvent(event.Pass());
 }
 
 }  // namespace chromeos