Consolidate two IsArcWindow functions to reduce code duplication

components/arc/arc_util_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 "components/arc/arc_util.h"
 
 #include <memory>
 #include <string>
 
+#include "ash/shared/app_types.h"
+#include "ash/wm_window.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/test/scoped_feature_list.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/test/test_windows.h"
 
 namespace arc {
 namespace {
 
 // If an instance is created, based on the value passed to the consturctor,
 // EnableARC feature is enabled/disabled in the scope.
 class ScopedArcFeature {
  public:
   explicit ScopedArcFeature(bool enabled) {
     constexpr char kArcFeatureName[] = "EnableARC";
@@ skipping 131 matching lines @@
 
 TEST_F(ArcUtilTest, IsArcOptInVerificationDisabled) {
   auto* command_line = base::CommandLine::ForCurrentProcess();
   command_line->InitFromArgv({""});
   EXPECT_FALSE(IsArcOptInVerificationDisabled());
 
   command_line->InitFromArgv({"", "--disable-arc-opt-in-verification"});
   EXPECT_TRUE(IsArcOptInVerificationDisabled());
 }
 
+TEST_F(ArcUtilTest, IsArcAppWindow) {
+  std::unique_ptr<aura::Window> window(
+      aura::test::CreateTestWindowWithId(0, nullptr));
+  EXPECT_FALSE(IsArcAppWindow(window.get()));
+  ash::WmWindow* wm_window = ash::WmWindow::Get(window.get());
+  ASSERT_TRUE(wm_window);
+
+  wm_window->SetAppType(static_cast<int>(ash::AppType::CHROME_APP));
+  EXPECT_FALSE(IsArcAppWindow(window.get()));
+  wm_window->SetAppType(static_cast<int>(ash::AppType::ARC_APP));
+  EXPECT_TRUE(IsArcAppWindow(window.get()));
+
+  EXPECT_FALSE(IsArcAppWindow(nullptr));
+}
+
 }  // namespace
 }  // namespace arc