Switch to standard integer types in base/android/.

base/android/cxa_demangle_stub.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 <stddef.h>
 #include <unistd.h>
 
 // LLVM's demangler is large, and we have no need of it.  Overriding it with
 // our own stub version here stops a lot of code being pulled in from libc++.
 // More here:
 //   https://llvm.org/svn/llvm-project/libcxxabi/trunk/src/cxa_demangle.cpp
 extern "C" char* __cxa_demangle(const char* mangled_name,
                                 char* buf,
                                 size_t* n,
                                 int* status) {
   static const int kMemoryAllocFailure = -1;  // LLVM's memory_alloc_failure.
   if (status)
     *status = kMemoryAllocFailure;
   return nullptr;
 }