[WIP] ash/extensions: Add experimental extension support for window-management in ash.

chrome/browser/extensions/api/wm/wm_utils.h

Index: chrome/browser/extensions/api/wm/wm_utils.h
diff --git a/chrome/browser/extensions/api/wm/wm_utils.h b/chrome/browser/extensions/api/wm/wm_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..cdad83033c24bbe614968183a67f122dabdc457b
--- /dev/null
+++ b/chrome/browser/extensions/api/wm/wm_utils.h
@@ -0,0 +1,70 @@
+// 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_WM_WM_UTILS_H_
+#define CHROME_BROWSER_EXTENSIONS_API_WM_WM_UTILS_H_
+
+#include <list>
+#include <map>
+#include <vector>
+
+#include "base/memory/singleton.h"
+
+namespace aura {
+class Window;
+}
+
+namespace extensions {
+namespace api {
+
+namespace experimental_wm {
+class AshWindow;
+}
+
+namespace wm {
+
+class WindowIdTracker {
+ private:
+  WindowIdTracker();
+  ~WindowIdTracker();
+
+ public:
+  static WindowIdTracker* GetInstance();
+
+  int WindowExtensionId(const aura::Window* window);
+
+  const aura::Window* ExtensionIdWindow(int extension_id);
+
+  int TrackWindow(const aura::Window* window);
+
+  void UntrackWindow(const aura::Window* window);
+
+  void ActivateWindow(const aura::Window* window);
+
+  std::vector<const aura::Window*> AllWindows(bool activation);
+
+ private:
+  // Requirement for Signleton
+  friend struct DefaultSingletonTraits<WindowIdTracker>;
+
+  std::list<const aura::Window*> activation_order_;
+  std::list<const aura::Window*> creation_order_;
+  std::map<int, const aura::Window*> reverse_lookup_;
+  std::map<const aura::Window*, int> lookup_;
+  int next_window_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowIdTracker);
+};
+
+namespace utils {
+
+void AuraWindowToExtensionWindow(const aura::Window* window,
+                                 experimental_wm::AshWindow* extension_window);
+
+}  // namespace utils
+}  // namespace wm
+}  // namespace api
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_WM_WM_UTILS_H_