Revert "views: Move widget/ directory to ui/views." properly.

views/widget/child_window_message_processor.cc

Index: views/widget/child_window_message_processor.cc
diff --git a/views/widget/child_window_message_processor.cc b/views/widget/child_window_message_processor.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e1cfa3149c24d250130dd109b1fb4cf335afc1d8
--- /dev/null
+++ b/views/widget/child_window_message_processor.cc
@@ -0,0 +1,28 @@
+// 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 "base/logging.h"
+#include "ui/base/view_prop.h"
+
+namespace views {
+
+static const char* const kChildWindowKey = "__CHILD_WINDOW_MESSAGE_PROCESSOR__";
+
+// static
+ui::ViewProp* ChildWindowMessageProcessor::Register(
+    HWND hwnd,
+    ChildWindowMessageProcessor* processor) {
+  DCHECK(processor);
+  return new ui::ViewProp(hwnd, kChildWindowKey, processor);
+}
+
+// static
+ChildWindowMessageProcessor* ChildWindowMessageProcessor::Get(HWND hwnd) {
+  return reinterpret_cast<ChildWindowMessageProcessor*>(
+    ui::ViewProp::GetValue(hwnd, kChildWindowKey));
+}
+
+}  // namespace