app_list: Add sync animation.

chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.cc

Index: chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.cc
diff --git a/chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.cc b/chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c791c006028ebd06470872de1959646affa3d17b
--- /dev/null
+++ b/chrome/browser/ui/ash/app_list/app_sync_ui_state_watcher.cc
@@ -0,0 +1,30 @@
+// 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/ui/ash/app_list/app_sync_ui_state_watcher.h"
+
+#include "chrome/browser/ui/ash/app_sync_ui_state.h"
+#include "ui/app_list/app_list_model.h"
+
+AppSyncUIStateWatcher::AppSyncUIStateWatcher(Profile* profile,
+                                             app_list::AppListModel* model)
+    : app_sync_ui_state_(AppSyncUIState::Get(profile)),
+      model_(model) {
+  if (app_sync_ui_state_) {
+    app_sync_ui_state_->AddObserver(this);
+    OnAppSyncUIStatusChanged();
+  }
+}
+
+AppSyncUIStateWatcher::~AppSyncUIStateWatcher() {
+  if (app_sync_ui_state_)
+    app_sync_ui_state_->RemoveObserver(this);
+}
+
+void AppSyncUIStateWatcher::OnAppSyncUIStatusChanged() {
+  if (app_sync_ui_state_->status() == AppSyncUIState::STATUS_SYNCING)
+    model_->SetStatus(app_list::AppListModel::STATUS_SYNCING);
+  else
+    model_->SetStatus(app_list::AppListModel::STATUS_NORMAL);
+}