GTK: A first *very* rough cut at a global menu.

chrome/browser/ui/gtk/browser_window_gtk.h

Index: chrome/browser/ui/gtk/browser_window_gtk.h
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.h b/chrome/browser/ui/gtk/browser_window_gtk.h
index a372ad99a1a0fa715c62bd7facded5d553989c29..97875e8ac39e1c35c80b435fa8b46967d7f80189 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.h
+++ b/chrome/browser/ui/gtk/browser_window_gtk.h
@@ -31,6 +31,7 @@ class CustomDrawButton;
 class DownloadShelfGtk;
 class FindBarGtk;
 class FullscreenExitBubbleGtk;
+class GlobalMenuBar;
 class InfoBarContainerGtk;
 class LocationBar;
 class StatusBubbleGtk;
@@ -424,6 +425,10 @@ class BrowserWindowGtk : public BrowserWindow,
 
   GdkWindowState state_;
 
+  // Controls a hidden GtkMenuBar that we keep updated so GNOME can take a look
+  // inside "our menu bar" and present it in the top panel, akin to Mac OS.
+  scoped_ptr<GlobalMenuBar> global_menu_bar_;
+
   // The container for the titlebar + tab strip.
   scoped_ptr<BrowserTitlebar> titlebar_;