Run the "Relaunch Chrome" dialog test everywhere.

ui/views/test/widget_test_unittest.cc

 // Copyright 2017 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 "ui/views/test/widget_test.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
+#if defined(USE_AURA)
+#include "ui/aura/window.h"
+#endif
+
 namespace views {
 namespace test {
 namespace {
 
 // Insert |widget| into |expected| and ensure it's reported by GetAllWidgets().
 void ExpectAdd(Widget::Widgets* expected, Widget* widget, const char* message) {
   SCOPED_TRACE(message);
   EXPECT_TRUE(expected->insert(widget).second);
   Widget::Widgets actual = WidgetTest::GetAllWidgets();
   EXPECT_EQ(expected->size(), actual.size());
@@ skipping 40 matching lines @@
 
   Widget* native_child = CreateChildNativeWidgetWithParent(native);
   ExpectAdd(&expected, native_child, "native_child");
 
   Widget* desktop = CreateNativeDesktopWidget();
   ExpectAdd(&expected, desktop, "desktop");
 
   Widget* desktop_child = CreateChildNativeWidgetWithParent(desktop);
   ExpectAdd(&expected, desktop_child, "desktop_child");
 
+#if defined(USE_AURA)
+  // A DesktopWindowTreeHost has both a root aura::Window and a content window.
+  // DesktopWindowTreeHostX11::GetAllOpenWindows() returns content windows, so
+  // ensure that a Widget parented to the root window is also found.
+  Widget* desktop_cousin =
+      CreateChildPlatformWidget(desktop->GetNativeView()->GetRootWindow());
+  ExpectAdd(&expected, desktop_cousin, "desktop_cousin");
+  ExpectClose(&expected, {desktop_cousin}, "desktop_cousin");
+#endif  // USE_AURA
+
   ExpectClose(&expected, {desktop, desktop_child}, "desktop");
   ExpectClose(&expected, {native, native_child}, "native");
   ExpectClose(&expected, {platform, platform_child}, "platform");
   ExpectClose(&expected, {frameless}, "frameless");
 }
 
 }  // namespace views
 }  // namespace test