Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/login/signin/device_id_browsertest.cc

 // Copyright 2015 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/command_line.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 128 matching lines @@
     return base::CommandLine::ForCurrentProcess()
         ->GetSwitchValuePath(::switches::kUserDataDir)
         .Append(kRefreshTokenToDeviceIdMapFile);
   }
 
   void LoadRefreshTokenToDeviceIdMap() {
     std::string file_contents;
     if (!base::ReadFileToString(GetRefreshTokenToDeviceIdMapFilePath(),
                                 &file_contents))
       return;
-    scoped_ptr<base::Value> value(base::JSONReader::Read(file_contents));
+    std::unique_ptr<base::Value> value(base::JSONReader::Read(file_contents));
     base::DictionaryValue* dictionary;
     EXPECT_TRUE(value->GetAsDictionary(&dictionary));
     FakeGaia::RefreshTokenToDeviceIdMap map;
     for (base::DictionaryValue::Iterator it(*dictionary); !it.IsAtEnd();
          it.Advance()) {
       std::string device_id;
       EXPECT_TRUE(it.value().GetAsString(&device_id));
       map[it.key()] = device_id;
     }
     fake_gaia_->SetRefreshTokenToDeviceIdMap(map);
@@ skipping 128 matching lines @@
 IN_PROC_BROWSER_TEST_F(DeviceIDTest, LegacyUsers) {
   EXPECT_TRUE(GetDeviceId(AccountId::FromUserEmail(kFakeUserEmail)).empty());
   SignInOffline(kFakeUserEmail, kFakeUserPassword);
   // Last param |auth_code| is empty, because we don't pass a device ID to GAIA
   // in this case.
   CheckDeviceIDIsConsistent(AccountId::FromUserEmail(kFakeUserEmail),
                             std::string());
 }
 
 }  // namespace chromeos