Add support for managing active state of platform apps

chrome/browser/ui/base_window.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_UI_BASE_WINDOW_H_
 #define CHROME_BROWSER_UI_BASE_WINDOW_H_
 #pragma once
 
 #include "base/compiler_specific.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 class Rect;
 }
 
 class SkRegion;
 
 // 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).
 
 class BaseWindow {
  public:
   // Returns true if the window is currently the active/focused window.
   virtual bool IsActive() const = 0;
 
   // Returns true if the window is maximized (aka zoomed).
   virtual bool IsMaximized() const = 0;
 
   // Returns true if the window is minimized.
   virtual bool IsMinimized() const = 0;
 
   // Returns true if the window is full screen.
   virtual bool IsFullscreen() const = 0;
 
+  // Return a platform dependent identifier for this window.
+  virtual gfx::NativeWindow GetNativeWindow() = 0;
+
   // Returns the nonmaximized bounds of the window (even if the window is
   // currently maximized or minimized) in terms of the screen coordinates.
   virtual gfx::Rect GetRestoredBounds() const = 0;
 
   // Retrieves the window's current bounds, including its window.
   // This will only differ from GetRestoredBounds() for maximized
   // and minimized windows.
   virtual gfx::Rect GetBounds() const = 0;
 
   // Shows the window, or activates it if it's already visible.
@@ skipping 32 matching lines @@
 
   // Flashes the taskbar item associated with this window.
   // Set |flash| to true to initiate flashing, false to stop flashing.
   virtual void FlashFrame(bool flash) = 0;
 
   // Returns true if a window is set to be always on top.
   virtual bool IsAlwaysOnTop() const = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_BASE_WINDOW_H_