Remove oak windows and its flags.

ui/oak/oak_tree_model.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 "ui/oak/oak_tree_model.h"
-
-#include "base/strings/utf_string_conversions.h"
-#include "ui/aura/root_window.h"
-#include "ui/aura/window.h"
-#include "ui/base/models/tree_node_model.h"
-
-namespace oak {
-namespace internal {
-
-base::string16 GetNodeTitleForWindow(aura::Window* window) {
-  std::string window_name = window->name();
-  if (window_name.empty())
-    window_name.append("Unnamed window");
-  return base::ASCIIToUTF16(window_name);
-}
-
-void AddChildWindows(aura::Window* parent_window, WindowNode* parent_node) {
-  aura::Window::Windows::const_iterator it = parent_window->children().begin();
-  for (; it != parent_window->children().end(); ++it) {
-    WindowNode* child_node = new WindowNode(GetNodeTitleForWindow(*it), *it);
-    parent_node->Add(child_node, parent_node->child_count());
-    AddChildWindows(*it, child_node);
-  }
-}
-
-TreeOfWindows* GenerateModel(aura::Window* root) {
-  WindowNode* root_node = new WindowNode(GetNodeTitleForWindow(root), root);
-  TreeOfWindows* tree = new TreeOfWindows(root_node);
-  AddChildWindows(root, root_node);
-  return tree;
-}
-
-}  // namespace internal
-}  // namespace oak