RandUInt -> RandUint to match the style of other Uint functions.

base/rand_util_posix.cc

 // Copyright (c) 2008 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/rand_util.h"
 
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 
 namespace base {
 
-uint64 RandUInt64() {
+uint64 RandUint64() {
   uint64 number;
 
   int urandom_fd = open("/dev/urandom", O_RDONLY);
   CHECK(urandom_fd >= 0);
   ssize_t bytes_read = read(urandom_fd, &number, sizeof(number));
   CHECK(bytes_read == sizeof(number));
   close(urandom_fd);
 
   return number;
 }
 
 }  // namespace base