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

chrome/browser/ui/panels/panel_browser_window_gtk.h

Index: chrome/browser/ui/panels/panel_browser_window_gtk.h
diff --git a/chrome/browser/ui/panels/panel_browser_window_gtk.h b/chrome/browser/ui/panels/panel_browser_window_gtk.h
index 0b111bf12f1d0681093275a2d517db5a56fdaa40..c2ade9d8cded2f66291e2b5160ba20e940331cc2 100644
--- a/chrome/browser/ui/panels/panel_browser_window_gtk.h
+++ b/chrome/browser/ui/panels/panel_browser_window_gtk.h
@@ -90,6 +90,7 @@ class PanelBrowserWindowGtk : public BrowserWindowGtk,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandlePanelKeyboardEvent(
       const NativeWebKeyboardEvent& event) OVERRIDE;
+  virtual void FullScreenModeChanged(bool is_full_screen_mode_on) OVERRIDE;
   virtual Browser* GetPanelBrowser() const OVERRIDE;
   virtual void DestroyPanelBrowser() OVERRIDE;
   virtual gfx::Size WindowSizeFromContentSize(