Move TestingPrefService to use unique_ptr<Value>

chrome/browser/ui/app_list/arc/arc_app_unittest.cc

 // Copyright 2015 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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <map>
 #include <memory>
@@ skipping 501 matching lines @@
         return false;
     }
   }
 
   // ArcPlayStoreAppTest:
   void OnBeforeArcTestSetup() override {
     policy::ProfilePolicyConnector* const connector =
         policy::ProfilePolicyConnectorFactory::GetForBrowserContext(profile());
     connector->OverrideIsManagedForTesting(true);
     profile()->GetTestingPrefService()->SetManagedPref(
-        prefs::kArcEnabled, new base::Value(IsEnabledByPolicy()));
+        prefs::kArcEnabled, base::MakeUnique<base::Value>(IsEnabledByPolicy()));
 
     ArcPlayStoreAppTest::OnBeforeArcTestSetup();
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ArcDefaulAppForManagedUserTest);
 };
 
 class ArcAppModelBuilderRecreate : public ArcAppModelBuilderTest {
  public:
@@ skipping 1047 matching lines @@
                         ::testing::ValuesIn(kUnmanagedArcStates));
 INSTANTIATE_TEST_CASE_P(,
                         ArcDefaulAppForManagedUserTest,
                         ::testing::ValuesIn(kManagedArcStates));
 INSTANTIATE_TEST_CASE_P(,
                         ArcPlayStoreAppTest,
                         ::testing::ValuesIn(kUnmanagedArcStates));
 INSTANTIATE_TEST_CASE_P(,
                         ArcAppModelBuilderRecreate,
                         ::testing::ValuesIn(kUnmanagedArcStates));