Remove USE_LINUX_BREAKPAD ifdef since we don't need it for chromium anymore.

base/process_util_linux.cc

 // Copyright (c) 2012 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_util.h"
 
 #include <dirent.h>
 #include <malloc.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/process/internal_linux.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/sys_info.h"
 #include "base/threading/thread_restrictions.h"
 
 namespace base {
 
-#if defined(USE_LINUX_BREAKPAD)
 size_t g_oom_size = 0U;
-#endif
 
 const char kProcSelfExe[] = "/proc/self/exe";
 
 ProcessId GetParentProcessId(ProcessHandle process) {
   ProcessId pid =
       internal::ReadProcStatsAndGetFieldAsInt(process, internal::VM_PPID);
   if (pid)
     return pid;
   return -1;
 }
 
 FilePath GetProcessExecutablePath(ProcessHandle process) {
   FilePath stat_file = internal::GetProcPidDir(process).Append("exe");
   FilePath exe_name;
   if (!file_util::ReadSymbolicLink(stat_file, &exe_name)) {
     // No such process.  Happens frequently in e.g. TerminateAllChromeProcesses
     return FilePath();
   }
   return exe_name;
 }
 
 int GetNumberOfThreads(ProcessHandle process) {
   return internal::ReadProcStatsAndGetFieldAsInt(process,
                                                  internal::VM_NUMTHREADS);
 }
 
 }  // namespace base