Refactor extension event distribution to use Values instead of JSON strings.

chrome/browser/extensions/api/runtime/runtime_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/runtime/runtime_api.h"
 
 #include "chrome/browser/extensions/event_router.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_system.h"
@@ skipping 17 matching lines @@
     Profile* profile, const std::string& extension_id) {
   ExtensionSystem* system = ExtensionSystem::Get(profile);
   if (!system)
     return;
 
   // Special case: normally, extensions add their own lazy event listeners.
   // However, since the extension has just been installed, it hasn't had a
   // chance to register for events. So we register on its behalf. If the
   // extension does not actually have a listener, the event will just be
   // ignored.
+  scoped_ptr<ListValue> event_args(new ListValue());
   system->event_router()->AddLazyEventListener(kOnInstalledEvent, extension_id);
   system->event_router()->DispatchEventToExtension(
-      extension_id, kOnInstalledEvent, "[]", NULL, GURL());
+      extension_id, kOnInstalledEvent, event_args.Pass(), NULL, GURL());
 }
 
 bool RuntimeGetBackgroundPageFunction::RunImpl() {
   ExtensionHost* host =
       ExtensionSystem::Get(profile())->process_manager()->
           GetBackgroundHostForExtension(extension_id());
   if (host) {
     OnPageLoaded(host);
   } else if (GetExtension()->has_lazy_background_page()) {
     ExtensionSystem::Get(profile())->lazy_background_task_queue()->
@@ skipping 12 matching lines @@
 void RuntimeGetBackgroundPageFunction::OnPageLoaded(ExtensionHost* host) {
   if (host) {
     SendResponse(true);
   } else {
     error_ = kPageLoadError;
     SendResponse(false);
   }
 }
 
 }   // namespace extensions