Set up the infrastructure for Extension event metrics.

chrome/browser/extensions/api/input_ime/input_ime_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/extensions/api/input_ime/input_ime_api.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/chromeos/input_method/input_method_engine.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
@@ skipping 321 matching lines @@
           return;
         extensions::ProcessManager* process_manager =
             extensions::ProcessManager::Get(profile_);
         if (extensions::BackgroundInfo::HasBackgroundPage(extension) &&
             !process_manager->GetBackgroundHostForExtension(extension_id_)) {
           return;
         }
       }
     }
 
-    scoped_ptr<extensions::Event> event(
-        new extensions::Event(event_name, args.Pass()));
+    scoped_ptr<extensions::Event> event(new extensions::Event(
+        extensions::events::UNKNOWN, event_name, args.Pass()));
     event->restrict_to_browser_context = profile_;
     extensions::EventRouter::Get(profile_)
         ->DispatchEventToExtension(extension_id_, event.Pass());
   }
 
   // Returns true if the extension is ready to accept key event, otherwise
   // returns false.
   bool ShouldForwardKeyEvent() const {
     // Only forward key events to extension if there are non-lazy listeners
     // for onKeyEvent. Because if something wrong with the lazy background
@@ skipping 583 matching lines @@
   InputMethodEngineInterface* engine =
       GetInputImeEventRouter(
           Profile::FromBrowserContext(details.browser_context))
           ->GetActiveEngine(details.extension_id);
   // Notifies the IME extension for IME ready with onActivate/onFocus events.
   if (engine)
     engine->Enable(engine->GetActiveComponentId());
 }
 
 }  // namespace extensions