GTK: Compute infobubble rects correctly.

chrome/common/gtk_util.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_COMMON_GTK_UTIL_H_
 #define CHROME_COMMON_GTK_UTIL_H_
 
 #include <gtk/gtk.h>
 #include <string>
 #include <vector>
@@ skipping 166 matching lines @@
 void SetAlwaysShowImage(GtkWidget* image_menu_item);
 
 // Returns a static instance of a GdkCursor* object, sharable across the
 // process.  Returns a GdkCursor with a +1 refcount, as if it was just created
 // with gdk_cursor_new(); owner must gdk_cursor_unref() it when done with it.
 GdkCursor* GetCursor(GdkCursorType type);
 
 // Stacks a |popup| window directly on top of a |toplevel| window.
 void StackPopupWindow(GtkWidget* popup, GtkWidget* toplevel);
 
+// Get a rectangle corresponding to a widget's allocation relative to its
+// toplevel window's origin.
+gfx::Rect GetWidgetRectRelativeToToplevel(GtkWidget* widget);
+
 }  // namespace gtk_util
 
 #endif  // CHROME_COMMON_GTK_UTIL_H_