WIP: Eliminate event.target() usage from TrayEventFilter

ash/mus/container_delegate_mus.cc

Index: ash/mus/container_delegate_mus.cc
diff --git a/ash/mus/container_delegate_mus.cc b/ash/mus/container_delegate_mus.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e7b0e02d1522d4c3180a442d50f6d886079f99f6
--- /dev/null
+++ b/ash/mus/container_delegate_mus.cc
@@ -0,0 +1,51 @@
+// 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 "ash/mus/container_delegate_mus.h"
+
+#include <stdint.h>
+
+#include "components/mus/public/cpp/property_type_converters.h"
+#include "components/mus/public/cpp/window.h"
+#include "components/mus/public/cpp/window_property.h"
+#include "mash/wm/public/interfaces/container.mojom.h"
+#include "ui/views/mus/native_widget_mus.h"
+#include "ui/views/widget/widget.h"
+
+using mash::wm::mojom::Container;
+
+namespace ash {
+namespace sysui {
+
+namespace {
+
+// Returns true if a top-level |widget| is in |container|.
+bool IsInContainer(views::Widget* widget, Container container) {
+  mus::Window* window = static_cast<views::NativeWidgetMus*>(widget
+      ->native_widget())->window();
+  if (window->HasSharedProperty(mash::wm::mojom::kWindowContainer_Property)) {
+    Container c = static_cast<Container>(window->GetSharedProperty<int32_t>(
+        mash::wm::mojom::kWindowContainer_Property));
+    LOG(ERROR) << "JAMES IsInContainer got " << c;
+    return container == c;  //JAMES inline me
+  }
+  return false;
+}
+
+}  // namespace
+
+ContainerDelegateMus::ContainerDelegateMus() {}
+
+ContainerDelegateMus::~ContainerDelegateMus() {}
+
+bool ContainerDelegateMus::IsInMenuContainer(views::Widget* widget) {
+  return IsInContainer(widget, Container::MENUS);
+}
+
+bool ContainerDelegateMus::IsInStatusContainer(views::Widget* widget) {
+  return IsInContainer(widget, Container::STATUS);
+}
+
+}  // namespace sysui
+}  // namespace ash