Switch to standard integer types in components/, part 2 of 4.

components/html_viewer/discardable_memory_allocator_unittest.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 "components/html_viewer/discardable_memory_allocator.h"
 
+#include <stddef.h>
+
 #include "base/memory/discardable_memory.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace html_viewer {
 namespace {
 
 const size_t kOneKilobyte = 1024;
 const size_t kAlmostOneMegabyte = 1023 * kOneKilobyte;
 const size_t kOneMegabyte = 1024 * kOneKilobyte;
 
@@ skipping 43 matching lines @@
   EXPECT_NE(nullptr, chunk_two->data());
   EXPECT_NE(nullptr, chunk_three->data());
 
   chunk_one->Unlock();
   chunk_two->Unlock();
   chunk_three->Unlock();
 }
 
 }  // namespace
 }  // namespace html_viewer