Create BaseWindow and ExtensionWindowWrapper for extension API access to Panels

chrome/browser/extensions/extension_window_list.h

+// 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_EXTENSION_WINDOW_LIST_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_WINDOW_LIST_H_
+#pragma once
+
+#include <list>
+
+#include "base/compiler_specific.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/extensions/extension_window_controller.h"
+
+class Profile;
+
+// Class to maintain a list of ExtensionWindowControllers.
+class ExtensionWindowList {
+ public:
+  typedef std::list<ExtensionWindowController*> WindowList;
+  typedef ExtensionWindowController::ProfileMatchType ProfileMatchType;
+
+  ExtensionWindowList();
+  ~ExtensionWindowList();
+
+  void AddExtensionWindow(ExtensionWindowController* window);
+  void RemoveExtensionWindow(ExtensionWindowController* window);
+
+  // Returns a window matching the profile and id, or NULL.
+  ExtensionWindowController* FindWindowById(Profile* profile,
+                                            ProfileMatchType match_type,
+                                            int id) const;
+
+  // Returns the focused or last added window matching the profile, or NULL.
+  ExtensionWindowController* CurrentWindow(Profile* profile,
+                                           ProfileMatchType match_type) const;
+
+  const WindowList& windows() const { return windows_; }
+
+  static ExtensionWindowList* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<ExtensionWindowList>;
+
+  // Entries are not owned by this class and must be removed when destroyed.
+  WindowList windows_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionWindowList);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WINDOW_LIST_H_