Paint the spy guy.

chrome/browser/gtk/tabs/tab_strip_gtk.h

 // Copyright (c) 2009 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_GTK_TABS_TAB_STRIP_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_STRIP_GTK_H_
 
 #include <gtk/gtk.h>
 #include <vector>
 
@@ skipping 56 matching lines @@
 
   // Destroys the active drag controller.
   void DestroyDragController();
 
   // Removes the drag source tab from this tabstrip, and deletes it.
   void DestroyDraggedSourceTab(TabGtk* tab);
 
   // Retrieve the ideal bounds for the Tab at the specified index.
   gfx::Rect GetIdealBounds(int index);
 
-  // Return the origin of the tab strip in coordinates relative to the GdkWindow
-  // of |widget|. Used to help other widgets draw their background relative to
-  // the tabstrip.
+  // Return the origin of the tab strip in coordinates relative to where we
+  // start drawing the background theme image. This is the x coordinate of
+  // the origin of the GdkWindow of widget(), but the y coordinate of the origin
+  // of widget() itself.
+  // Used to help other widgets draw their background relative to the tabstrip.
+  // Should only be called after both the tabstrip and |widget| have been
+  // allocated.
   gfx::Point GetTabStripOriginForWidget(GtkWidget* widget);
 
  protected:
   // TabStripModelObserver implementation:
   virtual void TabInsertedAt(TabContents* contents,
                              int index,
                              bool foreground);
   virtual void TabDetachedAt(TabContents* contents, int index);
   virtual void TabSelectedAt(TabContents* old_contents,
                              TabContents* contents,
@@ skipping 288 matching lines @@
   // ResizeLayoutTabsNow method.
   ScopedRunnableMethodFactory<TabStripGtk> resize_layout_factory_;
 
   // True if the tabstrip has already been added as a MessageLoop observer.
   bool added_as_message_loop_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TabStripGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_TAB_STRIP_GTK_H_