Notify launcher page with onTransitionChanged event

chrome/browser/ui/app_list/launcher_page_event_dispatcher.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 "chrome/browser/ui/app_list/launcher_page_event_dispatcher.h"
+
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/api/launcher_page.h"
+#include "extensions/browser/event_router.h"
+
+namespace OnTransitionChanged =
+    extensions::api::launcher_page::OnTransitionChanged;
+
+namespace app_list {
+
+LauncherPageEventDispatcher::LauncherPageEventDispatcher(
+    Profile* profile,
+    const std::string& extension_id)
+    : profile_(profile), extension_id_(extension_id) {
+}
+
+LauncherPageEventDispatcher::~LauncherPageEventDispatcher() {
+}
+
+void LauncherPageEventDispatcher::ProgressChanged(double progress) {
+  SendEventToLauncherPage(OnTransitionChanged::kEventName,
+                          OnTransitionChanged::Create(progress));
+}
+
+void LauncherPageEventDispatcher::SendEventToLauncherPage(
+    const std::string& event_name,
+    scoped_ptr<base::ListValue> args) {
+  scoped_ptr<extensions::Event> event(
+      new extensions::Event(event_name, args.Pass()));
+  extensions::EventRouter::Get(profile_)
+      ->DispatchEventToExtension(extension_id_, event.Pass());
+}
+
+}  // namespace app_list