Minor C++ fixes found by Clang.

base/process_util_posix.cc

 // Copyright (c) 2006-2008 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 <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/resource.h>
@@ skipping 203 matching lines @@
     max_fds = INT_MAX;
 
   DirReaderPosix fd_dir(kFDDir);
 
   if (!fd_dir.IsValid()) {
     // Fallback case: Try every possible fd.
     for (rlim_t i = 0; i < max_fds; ++i) {
       const int fd = static_cast<int>(i);
       if (fd == STDIN_FILENO || fd == STDOUT_FILENO || fd == STDERR_FILENO)
         continue;
-      InjectiveMultimap::const_iterator i;
-      for (i = saved_mapping.begin(); i != saved_mapping.end(); i++) {
-        if (fd == i->dest)
+      InjectiveMultimap::const_iterator j;
+      for (j = saved_mapping.begin(); j != saved_mapping.end(); j++) {
+        if (fd == j->dest)
           break;
       }
-      if (i != saved_mapping.end())
+      if (j != saved_mapping.end())
         continue;
 
       // Since we're just trying to close anything we can find,
       // ignore any error return values of close().
       int unused ALLOW_UNUSED = HANDLE_EINTR(close(fd));
     }
     return;
   }
 
   const int dir_fd = fd_dir.fd();
@@ skipping 677 matching lines @@
                       const ProcessFilter* filter) {
   bool exited_cleanly =
       WaitForProcessesToExit(executable_name, wait_milliseconds,
                              filter);
   if (!exited_cleanly)
     KillProcesses(executable_name, exit_code, filter);
   return exited_cleanly;
 }
 
 }  // namespace base