chromeos: Move files in //ash/common to //ash, part 2

ash/wm_window_unittest.cc

 // 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/common/wm_window.h"
+#include "ash/wm_window.h"
 
 #include <memory>
 
-#include "ash/common/test/ash_test.h"
+#include "ash/test/ash_test.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
 
 namespace ash {
 
 using WmWindowTest = AshTest;
 
 namespace {
 
 // Tracks calls to OnWindowVisibilityChanged().
@@ skipping 55 matching lines @@
   WmWindow* parent_window = parent_window_owner->window();
   std::unique_ptr<WindowOwner> child_owner = CreateChildWindow(parent_window);
   WmWindow* child_window = child_owner->window();
   VisibilityObserver observer(child_window);
   parent_window->Hide();
   EXPECT_EQ(parent_window, observer.last_observed_window());
   EXPECT_FALSE(observer.last_observed_visible_value());
 }
 
 }  // namespace ash