Bypass ToplevelWindowEventFilter for panels.

ui/views/widget/native_widget_win.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_win.h"
 
 #include <dwmapi.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 2114 matching lines @@
     ex_style |= l10n_util::GetExtendedTooltipStyles();
   if (params.transparent)
     ex_style |= WS_EX_LAYERED;
   if (params.has_dropshadow) {
     class_style |= (base::win::GetVersion() < base::win::VERSION_XP) ?
         0 : CS_DROPSHADOW;
   }
 
   // Set type-dependent style attributes.
   switch (params.type) {
+    case Widget::InitParams::TYPE_PANEL:
+      ex_style |= WS_EX_TOPMOST;
+      // No break. Fall through to TYPE_WINDOW.
     case Widget::InitParams::TYPE_WINDOW: {
       style |= WS_SYSMENU | WS_CAPTION;
       bool can_resize = GetWidget()->widget_delegate()->CanResize();
       bool can_maximize = GetWidget()->widget_delegate()->CanMaximize();
       if (can_maximize) {
         style |= WS_OVERLAPPEDWINDOW;
       } else if (can_resize) {
         style |= WS_OVERLAPPED | WS_THICKFRAME;
       }
       if (delegate_->IsDialogBox()) {
@@ skipping 343 matching lines @@
   return (GetKeyState(VK_LBUTTON) & 0x80) ||
     (GetKeyState(VK_RBUTTON) & 0x80) ||
     (GetKeyState(VK_MBUTTON) & 0x80) ||
     (GetKeyState(VK_XBUTTON1) & 0x80) ||
     (GetKeyState(VK_XBUTTON2) & 0x80);
 }
 
 }  // namespace internal
 
 }  // namespace views