Make ValueDeserializer::Deserialize return scoped_ptr

extensions/common/file_util_unittest.cc

Index: extensions/common/file_util_unittest.cc
diff --git a/extensions/common/file_util_unittest.cc b/extensions/common/file_util_unittest.cc
index df82b8293ee5ac224137f569b7131a13855d0082..0814334bfacc283895372b39d95bdc636eeb7d2e 100644
--- a/extensions/common/file_util_unittest.cc
+++ b/extensions/common/file_util_unittest.cc
@@ -44,7 +44,7 @@ scoped_refptr<Extension> LoadExtensionManifest(
     int extra_flags,
     std::string* error) {
   JSONStringValueDeserializer deserializer(manifest_value);
-  scoped_ptr<base::Value> result(deserializer.Deserialize(NULL, error));
+  scoped_ptr<base::Value> result = deserializer.Deserialize(NULL, error);
   if (!result.get())
     return NULL;
   CHECK_EQ(base::Value::TYPE_DICTIONARY, result->GetType());