Bypass ToplevelWindowEventFilter for panels.

ui/views/widget/native_widget_gtk.cc

 // Copyright (c) 2011 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 "ui/views/widget/native_widget_gtk.h"
 
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <X11/extensions/shape.h>
 #include <gdk/gdk.h>
@@ skipping 153 matching lines @@
   if (widget) {
     Widget::Widgets* widgets = reinterpret_cast<Widget::Widgets*>(param);
     widgets->insert(widget);
   }
 }
 
 GtkWindowType WindowTypeToGtkWindowType(Widget::InitParams::Type type) {
   switch (type) {
     case Widget::InitParams::TYPE_BUBBLE:
     case Widget::InitParams::TYPE_WINDOW:
+    case Widget::InitParams::TYPE_PANEL:
     case Widget::InitParams::TYPE_WINDOW_FRAMELESS:
       return GTK_WINDOW_TOPLEVEL;
     default:
       return GTK_WINDOW_POPUP;
   }
   NOTREACHED();
   return GTK_WINDOW_TOPLEVEL;
 }
 
 // Converts a Windows-style hit test result code into a GDK window edge.
@@ skipping 2037 matching lines @@
     button_pressed = event->type == GDK_BUTTON_PRESS ||
         event->type == GDK_2BUTTON_PRESS ||
         event->type == GDK_3BUTTON_PRESS;
     gdk_event_free(event);
   }
   return button_pressed;
 }
 
 }  // namespace internal
 }  // namespace views