Switch to standard integer types in tools/.

tools/json_schema_compiler/test/choices_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/choices.h"
 
+#include <stddef.h>
+
 #include "base/strings/string_piece.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/json_schema_compiler/test/test_util.h"
 
 namespace {
 
 using namespace test::api::choices;
 using json_schema_compiler::test_util::Dictionary;
 using json_schema_compiler::test_util::List;
 using json_schema_compiler::test_util::ReadJson;
@@ skipping 266 matching lines @@
           obj->as_choice2->as_choice_types.get();
       // Bleh too much effort to test everything.
       ASSERT_EQ(2u, choice_types->size());
     }
 
     EXPECT_TRUE(base::Value::Equals(value.get(), obj->ToValue().get()));
   }
 }
 
 }  // namespace