chromeos: Make dbus::MessageReader memory ownership explicit

chromeos/dbus/session_manager_client.cc

 // Copyright (c) 2012 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 "chromeos/dbus/session_manager_client.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 385 matching lines @@
   }
 
   void ExtractString(const std::string& method_name,
                      dbus::Response* response,
                      std::string* extracted) {
     if (!response) {
       LOG(ERROR) << "Failed to call " << method_name;
       return;
     }
     dbus::MessageReader reader(response);
-    uint8* values = NULL;
+    const uint8* values = NULL;
     size_t length = 0;
     if (!reader.PopArrayOfBytes(&values, &length)) {
       LOG(ERROR) << "Invalid response: " << response->ToString();
       return;
     }
     // static_cast does not work due to signedness.
-    extracted->assign(reinterpret_cast<char*>(values), length);
+    extracted->assign(reinterpret_cast<const char*>(values), length);
   }
 
   // Called when kSessionManagerRetrievePolicy or
   // kSessionManagerRetrievePolicyForUser method is complete.
   void OnRetrievePolicy(const std::string& method_name,
                         const RetrievePolicyCallback& callback,
                         dbus::Response* response) {
     std::string serialized_proto;
     ExtractString(method_name, response, &serialized_proto);
     callback.Run(serialized_proto);
@@ skipping 208 matching lines @@
 
 SessionManagerClient* SessionManagerClient::Create(
     DBusClientImplementationType type) {
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new SessionManagerClientImpl();
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   return new SessionManagerClientStubImpl();
 }
 
 }  // namespace chromeos