Move more utility functions to arc_util.

chrome/browser/chromeos/arc/arc_util.h

+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_UTIL_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_ARC_UTIL_H_
+
+// Most utility should be put in components/arc/arc_util.{h,cc}, rather than
+// here. However, some utility implementation requires other modules defined in
+// chrome/, so this file contains such utilities.
+// Note that it is not allowed to have dependency from components/ to chrome/
+// by DEPS.
+
+class Profile;
+
+namespace arc {
+
+// Returns true if ARC is allowed to run for the given profile.
+// Otherwise, returns false, e.g. if the Profile is not for the primary user,
+// ARC is not available on the device, it is in the flow to set up managed
+// account creation.
+// nullptr can be safely passed to this function. In that case, returns false.
+bool IsArcAllowedForProfile(const Profile* profile);
+
+// Disallows ARC for all profiles for testing.
+// In most cases, disabling ARC should be done via commandline. However,
+// there are some cases to be tested where ARC is available, but ARC is not
+// supported for some reasons (e.g. incognito mode, supervised user,
+// secondary profile). On the other hand, some test infra does not support
+// such situations (e.g. API test). This is for workaround to emulate the
+// case.
+void DisallowArcForTesting();
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_UTIL_H_