Cleanup: Add a const variable for /proc/self/exe.

content/common/set_process_title.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 "content/common/set_process_title.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS)
 #include <limits.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 #include <string>
 
 #include "base/command_line.h"
 #endif  // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS)
 
 #if defined(OS_LINUX)
 #include <sys/prctl.h>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "base/process_util.h"
 #include "base/string_util.h"
 // Linux/glibc doesn't natively have setproctitle().
 #include "content/common/set_process_title_linux.h"
 #endif  // defined(OS_LINUX)
 
 // TODO(jrg): Find out if setproctitle or equivalent is available on Android.
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_SOLARIS) && \
   !defined(OS_ANDROID)
 
 void SetProcessTitleFromCommandLine(const char** main_argv) {
   // Build a single string which consists of all the arguments separated
   // by spaces. We can't actually keep them separate due to the way the
   // setproctitle() function works.
   std::string title;
   bool have_argv0 = false;
 
 #if defined(OS_LINUX)
   if (main_argv)
     setproctitle_init(main_argv);
 
   // In Linux we sometimes exec ourselves from /proc/self/exe, but this makes us
   // show up as "exe" in process listings. Read the symlink /proc/self/exe and
   // use the path it points at for our process title. Note that this is only for
   // display purposes and has no TOCTTOU security implications.
   FilePath target;
-  FilePath self_exe("/proc/self/exe");
+  FilePath self_exe(base::kProcSelfExe);
   if (file_util::ReadSymbolicLink(self_exe, &target)) {
     have_argv0 = true;
     title = target.value();
     // If the binary has since been deleted, Linux appends " (deleted)" to the
     // symlink target. Remove it, since this is not really part of our name.
     const std::string kDeletedSuffix = " (deleted)";
     if (EndsWith(title, kDeletedSuffix, true))
       title.resize(title.size() - kDeletedSuffix.size());
 #if defined(PR_SET_NAME)
     // If PR_SET_NAME is available at compile time, we try using it. We ignore
@@ skipping 16 matching lines @@
 }
 
 #else
 
 // All other systems (basically Windows & Mac) have no need or way to implement
 // this function.
 void SetProcessTitleFromCommandLine(const char** /* main_argv */) {
 }
 
 #endif