Update from https://crrev.com/320343

base/posix/unix_domain_socket_linux.cc

 // Copyright (c) 2011 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/posix/unix_domain_socket_linux.h"
 
 #include <errno.h>
 #include <sys/socket.h>
 #include <unistd.h>
 
@@ skipping 118 matching lines @@
   int* wire_fds = NULL;
   unsigned wire_fds_len = 0;
   base::ProcessId pid = -1;
 
   if (msg.msg_controllen > 0) {
     struct cmsghdr* cmsg;
     for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
       const unsigned payload_len = cmsg->cmsg_len - CMSG_LEN(0);
       if (cmsg->cmsg_level == SOL_SOCKET &&
           cmsg->cmsg_type == SCM_RIGHTS) {
-        DCHECK(payload_len % sizeof(int) == 0);
-        DCHECK(wire_fds == NULL);
+        DCHECK_EQ(payload_len % sizeof(int), 0u);
+        DCHECK_EQ(wire_fds, static_cast<void*>(nullptr));
         wire_fds = reinterpret_cast<int*>(CMSG_DATA(cmsg));
         wire_fds_len = payload_len / sizeof(int);
       }
 #if !defined(OS_NACL_NONSFI)
       // The PNaCl toolchain for Non-SFI binary build does not support
       // SCM_CREDENTIALS.
       if (cmsg->cmsg_level == SOL_SOCKET &&
           cmsg->cmsg_type == SCM_CREDENTIALS) {
-        DCHECK(payload_len == sizeof(struct ucred));
-        DCHECK(pid == -1);
+        DCHECK_EQ(payload_len, sizeof(struct ucred));
+        DCHECK_EQ(pid, -1);
         pid = reinterpret_cast<struct ucred*>(CMSG_DATA(cmsg))->pid;
       }
 #endif
     }
   }
 
   if (msg.msg_flags & MSG_TRUNC || msg.msg_flags & MSG_CTRUNC) {
     for (unsigned i = 0; i < wire_fds_len; ++i)
       close(wire_fds[i]);
     errno = EMSGSIZE;
@@ skipping 71 matching lines @@
     NOTREACHED();
     return -1;
   }
 
   if (result_fd)
     *result_fd = recv_fds.empty() ? -1 : recv_fds[0]->release();
 
   return reply_len;
 }
 #endif  // !defined(OS_NACL_NONSFI)