[Aura] Implement views-based applist.

ui/aura_shell/app_list/app_list_item_group_model.cc

Index: ui/aura_shell/app_list/app_list_item_group_model.cc
diff --git a/ui/aura_shell/app_list/app_list_item_group_model.cc b/ui/aura_shell/app_list/app_list_item_group_model.cc
new file mode 100644
index 0000000000000000000000000000000000000000..61e3b9e9b287abfedf132978a157e8e0a03389d4
--- /dev/null
+++ b/ui/aura_shell/app_list/app_list_item_group_model.cc
@@ -0,0 +1,25 @@
+// Copyright (c) 2011 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 "ui/aura_shell/app_list/app_list_item_group_model.h"
+
+namespace aura_shell {
+
+AppListItemGroupModel::AppListItemGroupModel(const std::string& title)
+    : title_(title) {
+}
+
+AppListItemGroupModel::~AppListItemGroupModel() {
+}
+
+void AppListItemGroupModel::AddItem(AppListItemModel* item) {
+  items_.Add(item);
+}
+
+AppListItemModel* AppListItemGroupModel::GetItem(int index) {
+  DCHECK(index >= 0 && index < item_count());
+  return items_.item_at(index);
+}
+
+}  // namespace aura_shell