Switch to standard integer types in base/android/.

base/android/library_loader/library_prefetcher.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/android/library_loader/library_prefetcher.h"
 
+#include <stddef.h>
 #include <sys/mman.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <unistd.h>
 #include <algorithm>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 175 matching lines @@
         std::count_if(is_page_resident.begin(), is_page_resident.end(),
                       [](unsigned char x) { return x & 1; });
   }
   if (total_pages == 0)
     return -1;
   return static_cast<int>((100 * resident_pages) / total_pages);
 }
 
 }  // namespace android
 }  // namespace base