Initial cut of ash/wm/common classes for mus

mash/wm/bridge/wm_lookup_mus.cc

Index: mash/wm/bridge/wm_lookup_mus.cc
diff --git a/mash/wm/bridge/wm_lookup_mus.cc b/mash/wm/bridge/wm_lookup_mus.cc
new file mode 100644
index 0000000000000000000000000000000000000000..59bcc644f244e3ff5b09c3276e27fd2b3df6ca62
--- /dev/null
+++ b/mash/wm/bridge/wm_lookup_mus.cc
@@ -0,0 +1,29 @@
+// Copyright 2016 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 "mash/wm/bridge/wm_lookup_mus.h"
+
+#include "mash/wm/bridge/wm_globals_mus.h"
+#include "mash/wm/bridge/wm_root_window_controller_mus.h"
+#include "mash/wm/bridge/wm_window_mus.h"
+#include "ui/views/widget/widget.h"
+
+namespace mash {
+namespace wm {
+
+WmLookupMus::WmLookupMus() {}
+
+WmLookupMus::~WmLookupMus() {}
+
+ash::wm::WmRootWindowController*
+WmLookupMus::GetRootWindowControllerWithDisplayId(int64_t id) {
+  return WmGlobalsMus::Get()->GetRootWindowControllerWithDisplayId(id);
+}
+
+ash::wm::WmWindow* WmLookupMus::GetWindowForWidget(views::Widget* widget) {
+  return WmWindowMus::Get(widget);
+}
+
+}  // namespace wm
+}  // namespace mash