Adds the ability for classes other than native control to process

views/widget/child_window_message_processor.cc

+// Copyright (c) 2010 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 "views/widget/child_window_message_processor.h"
+
+#include "app/win/scoped_prop.h"
+
+namespace views {
+
+static const wchar_t* kChildWindowKey = L"__CHILD_WINDOW_MESSAGE_PROCESSOR__";
+
+// static
+app::win::ScopedProp* ChildWindowMessageProcessor::Register(
+    HWND hwnd,
+    ChildWindowMessageProcessor* processor) {
+  DCHECK(processor);
+  return new app::win::ScopedProp(hwnd, kChildWindowKey, processor);
+}
+
+// static
+ChildWindowMessageProcessor* ChildWindowMessageProcessor::Get(HWND hwnd) {
+  return reinterpret_cast<ChildWindowMessageProcessor*>(
+      ::GetProp(hwnd, kChildWindowKey));
+}
+
+}  // namespace