Merge to M52: Fix a bug with the Chrome legacy window at times becoming a top level window with a n…

content/browser/renderer_host/legacy_render_widget_host_win.cc

 // Copyright (c) 2014 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 "content/browser/renderer_host/legacy_render_widget_host_win.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/win/win_util.h"
@@ skipping 44 matching lines @@
 
 void LegacyRenderWidgetHostHWND::Destroy() {
   if (::IsWindow(hwnd()))
     ::DestroyWindow(hwnd());
 }
 
 void LegacyRenderWidgetHostHWND::UpdateParent(HWND parent) {
   if (GetWindowEventTarget(GetParent()))
     GetWindowEventTarget(GetParent())->HandleParentChanged();
   ::SetParent(hwnd(), parent);
-  // If the new parent is the desktop Window, then we disable the child window
-  // to ensure that it does not receive any input events. It should not because
-  // of WS_EX_TRANSPARENT. This is only for safety.
-  if (parent == ::GetDesktopWindow()) {
-    ::EnableWindow(hwnd(), FALSE);
-  } else {
-    ::EnableWindow(hwnd(), TRUE);
-  }
 }
 
 HWND LegacyRenderWidgetHostHWND::GetParent() {
   return ::GetParent(hwnd());
 }
 
 void LegacyRenderWidgetHostHWND::Show() {
   ::ShowWindow(hwnd(), SW_SHOW);
 }
 
@@ skipping 331 matching lines @@
       direct_manipulation_helper_->Activate(hwnd());
     } else if (window_pos->flags & SWP_HIDEWINDOW) {
       direct_manipulation_helper_->Deactivate(hwnd());
     }
   }
   SetMsgHandled(FALSE);
   return 0;
 }
 
 }  // namespace content