chromeos: Make dbus::MessageReader memory ownership explicit

chrome/browser/password_manager/native_backend_kwallet_x_unittest.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 <algorithm>
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 402 matching lines @@
     if (wallet_.readEntry(folder_name, key, &value)) {
       response = dbus::Response::CreateEmpty();
       dbus::MessageWriter writer(response.get());
       writer.AppendArrayOfBytes(value.data(), value.size());
     }
   } else if (method_call->GetMember() == "writeEntry") {
     dbus::MessageReader reader(method_call);
     int handle = NativeBackendKWalletStub::kInvalidKWalletHandle;
     std::string folder_name;
     std::string key;
-    uint8_t* bytes = NULL;
+    const uint8_t* bytes = NULL;
     size_t length = 0;
     std::string app_name;
     EXPECT_TRUE(reader.PopInt32(&handle));
     EXPECT_TRUE(reader.PopString(&folder_name));
     EXPECT_TRUE(reader.PopString(&key));
     EXPECT_TRUE(reader.PopArrayOfBytes(&bytes, &length));
     EXPECT_TRUE(reader.PopString(&app_name));
     EXPECT_NE(NativeBackendKWalletStub::kInvalidKWalletHandle, handle);
     response = dbus::Response::CreateEmpty();
     dbus::MessageWriter writer(response.get());
@@ skipping 646 matching lines @@
   CheckVersion0Pickle(true, PasswordForm::SCHEME_BASIC);
 }
 
 TEST_F(NativeBackendKWalletPickleTest, ReadsOld64BitHTMLPickles) {
   CheckVersion0Pickle(false, PasswordForm::SCHEME_HTML);
 }
 
 TEST_F(NativeBackendKWalletPickleTest, ReadsOld64BitHTTPPickles) {
   CheckVersion0Pickle(false, PasswordForm::SCHEME_BASIC);
 }