Update from https://crrev.com/320343

base/process/process_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/process/process.h"
 
 #include <errno.h>
 #include <sys/resource.h>
 
 #include "base/files/file_util.h"
@@ skipping 85 matching lines @@
   DCHECK(IsValid());
 
 #if defined(OS_CHROMEOS)
   if (cgroups.Get().enabled) {
     std::string proc;
     if (base::ReadFileToString(
             base::FilePath(StringPrintf(kProcPath, process_)),
             &proc)) {
       std::vector<std::string> proc_parts;
       base::SplitString(proc, ':', &proc_parts);
-      DCHECK(proc_parts.size() == 3);
+      DCHECK_EQ(proc_parts.size(), 3u);
       bool ret = proc_parts[2] == std::string(kBackground);
       return ret;
     } else {
       return false;
     }
   }
 #endif
   return GetPriority() == kBackgroundPriority;
 }
 
@@ skipping 13 matching lines @@
   if (!CanBackgroundProcesses())
     return false;
 
   int priority = background ? kBackgroundPriority : kForegroundPriority;
   int result = setpriority(PRIO_PROCESS, process_, priority);
   DPCHECK(result == 0);
   return result == 0;
 }
 
 }  // namespace base