Fix IWYU violators that don't include scoped_ptr.h in CrOS build.

chromeos/dbus/fake_easy_unlock_client.cc

 // 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.
 
 #include "base/json/json_string_value_serializer.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "chromeos/dbus/fake_easy_unlock_client.h"
 
 namespace {
 
 // Keys generated using |GenerateEcP256KeyPair| are in the following format:
 // "{<key_type>: <key_pair_index>}".
 // <key_pair_index> is an integer identifying
 // the key pair.
 // <key_type> specifies whether the key is public or private. It can have one
@@ skipping 127 matching lines @@
           "\"signature_type\": \"%s\""
       "}}",
       message.c_str(),
       options.key.c_str(),
       options.associated_data.c_str(),
       options.encryption_type.c_str(),
       options.signature_type.c_str()));
 }
 
 }  // namespace chromeos