Convert //tools to use std::unique_ptr

tools/json_schema_compiler/test/callbacks_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 "tools/json_schema_compiler/test/callbacks.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 using namespace test::api::callbacks;
 
 TEST(JsonSchemaCompilerCallbacksTest, ReturnsObjectResultCreate) {
   ReturnsObject::Results::SomeObject some_object;
   some_object.state = ENUMERATION_FOO;
-  scoped_ptr<base::ListValue> results =
+  std::unique_ptr<base::ListValue> results =
       ReturnsObject::Results::Create(some_object);
 
   base::DictionaryValue* expected_dict = new base::DictionaryValue();
   expected_dict->SetString("state", "foo");
   base::ListValue expected;
   expected.Append(expected_dict);
   EXPECT_TRUE(results->Equals(&expected));
 }
 
 TEST(JsonSchemaCompilerCallbacksTest, ReturnsMultipleResultCreate) {
   ReturnsMultiple::Results::SomeObject some_object;
   some_object.state = ENUMERATION_FOO;
-  scoped_ptr<base::ListValue> results =
+  std::unique_ptr<base::ListValue> results =
       ReturnsMultiple::Results::Create(5, some_object);
 
   base::DictionaryValue* expected_dict = new base::DictionaryValue();
   expected_dict->SetString("state", "foo");
   base::ListValue expected;
   expected.Append(new base::FundamentalValue(5));
   expected.Append(expected_dict);
   EXPECT_TRUE(results->Equals(&expected));
 }