Set up the infrastructure for Extension event metrics.

chrome/browser/speech/extension_api/tts_extension_api.cc

 // Copyright (c) 2012 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/speech/extension_api/tts_extension_api.h"
 
 #include <string>
 
 #include "base/lazy_instance.h"
 #include "base/values.h"
@@ skipping 117 matching lines @@
   details->SetString(constants::kEventTypeKey, event_type_string);
   if (event_type == TTS_EVENT_ERROR) {
     details->SetString(constants::kErrorMessageKey, error_message);
   }
   details->SetInteger(constants::kSrcIdKey, utterance->src_id());
   details->SetBoolean(constants::kIsFinalEventKey, utterance->finished());
 
   scoped_ptr<base::ListValue> arguments(new base::ListValue());
   arguments->Set(0, details.release());
 
-  scoped_ptr<extensions::Event> event(
-      new extensions::Event(events::kOnEvent, arguments.Pass()));
+  scoped_ptr<extensions::Event> event(new extensions::Event(
+      ::extensions::events::UNKNOWN, ::events::kOnEvent, arguments.Pass()));
   event->restrict_to_browser_context = utterance->browser_context();
   event->event_url = utterance->src_url();
   extensions::EventRouter::Get(utterance->browser_context())
       ->DispatchEventToExtension(src_extension_id_, event.Pass());
 
   if (utterance->finished())
     delete this;
 }
 
 bool TtsSpeakFunction::RunAsync() {
@@ skipping 213 matching lines @@
 }
 
 static base::LazyInstance<BrowserContextKeyedAPIFactory<TtsAPI> > g_factory =
     LAZY_INSTANCE_INITIALIZER;
 
 BrowserContextKeyedAPIFactory<TtsAPI>* TtsAPI::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 }  // namespace extensions