Convert //extensions/browser from scoped_ptr to std::unique_ptr

extensions/browser/extension_error_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 EXTENSIONS_BROWSER_EXTENSION_ERROR_TEST_UTIL_H_
 #define EXTENSIONS_BROWSER_EXTENSION_ERROR_TEST_UTIL_H_
 
+#include <memory>
 #include <string>
 
-#include "base/memory/scoped_ptr.h"
 
 namespace extensions {
 
 class ExtensionError;
 
 namespace error_test_util {
 
 // Create a new RuntimeError.
-scoped_ptr<ExtensionError> CreateNewRuntimeError(
+std::unique_ptr<ExtensionError> CreateNewRuntimeError(
     const std::string& extension_id,
     const std::string& message,
     bool from_incognito);
 
 // Create a new RuntimeError; incognito defaults to "false".
-scoped_ptr<ExtensionError> CreateNewRuntimeError(
-    const std::string& extension_id, const std::string& message);
-
-// Create a new ManifestError.
-scoped_ptr<ExtensionError> CreateNewManifestError(
+std::unique_ptr<ExtensionError> CreateNewRuntimeError(
     const std::string& extension_id,
     const std::string& message);
 
+// Create a new ManifestError.
+std::unique_ptr<ExtensionError> CreateNewManifestError(
+    const std::string& extension_id,
+    const std::string& message);
+
 }  // namespace error_test_util
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_ERROR_TEST_UTIL_H_