GTK: Compute infobubble rects correctly.

chrome/common/gtk_util.cc

 // 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.
 
 #include "chrome/common/gtk_util.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
 
 #include <cstdarg>
@@ skipping 550 matching lines @@
     } else {
       // The window manager shouldn't reparent override-redirect windows.
       DLOG(ERROR) << "override-redirect window " << window_xid
                   << "'s parent is " << window_parent
                   << ", rather than root window "
                   << x11_util::GetX11RootWindow();
     }
   }
 }
 
+gfx::Rect GetWidgetRectRelativeToToplevel(GtkWidget* widget) {
+  gint x = 0, y = 0;
+  DCHECK(gtk_widget_translate_coordinates(widget,
+                                          gtk_widget_get_toplevel(widget),
+                                          0, 0,
+                                          &x, &y));
+  return gfx::Rect(x, y, widget->allocation.width, widget->allocation.height);
+}
+
 }  // namespace gtk_util