Make panels not show on top when there is an app running in full screen mode.

chrome/browser/ui/panels/native_panel.h

 // Copyright (c) 2011 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_PANELS_NATIVE_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/panels/panel.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 41 matching lines @@
   virtual void PanelTabContentsFocused(TabContents* tab_contents) = 0;
   virtual void PanelCut() = 0;
   virtual void PanelCopy() = 0;
   virtual void PanelPaste() = 0;
   virtual void DrawAttention() = 0;
   virtual bool IsDrawingAttention() const = 0;
   virtual bool PreHandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event, bool* is_keyboard_shortcut) = 0;
   virtual void HandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event) = 0;
+  virtual void FullScreenModeChanged(bool is_full_screen) = 0;
 
   virtual Browser* GetPanelBrowser() const = 0;
   virtual void DestroyPanelBrowser() = 0;
 
   // Returns the exterior size of the panel window given the client content
   // size and vice versa.
   virtual gfx::Size WindowSizeFromContentSize(
       const gfx::Size& content_size) const = 0;
   virtual gfx::Size ContentSizeFromWindowSize(
       const gfx::Size& window_size) const = 0;
@@ skipping 28 matching lines @@
   // Verifies, on a deepest possible level, if the native panel is really
   // active, i.e. the titlebar is painted per its active state.
   virtual bool VerifyActiveState(bool is_active) = 0;
   virtual void WaitForWindowCreationToComplete() const { }
 
   virtual bool IsWindowSizeKnown() const = 0;
   virtual bool IsAnimatingBounds() const = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_