Move TestingPrefService to use unique_ptr<Value>

chrome/browser/extensions/extension_management_test_util.h

 // Copyright 2014 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_EXTENSIONS_EXTENSION_MANAGEMENT_TEST_UTIL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_MANAGEMENT_TEST_UTIL_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 101 matching lines @@
     const base::Value* pref_value =
         service_->GetManagedPref(pref_names::kExtensionManagement);
     const base::DictionaryValue* dict_value = nullptr;
     if (pref_value && pref_value->GetAsDictionary(&dict_value))
       SetPref(dict_value->DeepCopy());
     else
       SetPref(new base::DictionaryValue);
   }
 
   virtual ~ExtensionManagementPrefUpdater() {
-    service_->SetManagedPref(pref_names::kExtensionManagement,
-                             TakePref().release());
+    service_->SetManagedPref(pref_names::kExtensionManagement, TakePref());
   }
 
  private:
   TestingPrefService* service_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionManagementPrefUpdater);
 };
 
 // A helper class to manipulate the extension management policy in browser
 // tests.
 class ExtensionManagementPolicyUpdater
     : public ExtensionManagementPrefUpdaterBase {
  public:
   explicit ExtensionManagementPolicyUpdater(
       policy::MockConfigurationPolicyProvider* provider);
   ~ExtensionManagementPolicyUpdater() override;
 
  private:
   policy::MockConfigurationPolicyProvider* provider_;
   std::unique_ptr<policy::PolicyBundle> policies_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionManagementPolicyUpdater);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_MANAGEMENT_TEST_UTIL_H_