Support chrome.windows extension API events for browserless Panels.

chrome/browser/extensions/window_controller.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_WINDOW_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_WINDOW_CONTROLLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 11 matching lines @@
 
 namespace gfx {
 class Rect;
 }
 
 namespace extensions {
 class Extension;
 
 // This API needs to be implemented by any window that might be accessed
 // through chrome.windows or chrome.tabs (e.g. browser windows and panels).
+// Subclasses must add/remove themselves from the WindowControllerList
+// upon construction/destruction.
 class WindowController {
  public:
   enum Reason {
     REASON_NONE,
     REASON_NOT_EDITABLE,
   };
 
   WindowController(BaseWindow* window, Profile* profile);
   virtual ~WindowController();
 
@@ skipping 35 matching lines @@
  private:
   BaseWindow* window_;
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowController);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WINDOW_CONTROLLER_H_