Fix some grammatical errors in base/

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>
@@ skipping 738 matching lines @@
 #else
   // Set the new-out of memory handler.
   std::set_new_handler(&OnNoMemory);
   // If we're using glibc's allocator, the above functions will override
   // malloc and friends and make them die on out of memory.
 #endif
 }
 
 // NOTE: This is not the only version of this function in the source:
 // the setuid sandbox (in process_util_linux.c, in the sandbox source)
-// also has it's own C version.
+// also has its own C version.
 bool AdjustOOMScore(ProcessId process, int score) {
   if (score < 0 || score > kMaxOomScore)
     return false;
 
   FilePath oom_path(GetProcPidDir(process));
 
   // Attempt to write the newer oom_score_adj file first.
   FilePath oom_file = oom_path.AppendASCII("oom_score_adj");
   if (file_util::PathExists(oom_file)) {
     std::string score_str = base::IntToString(score);
@@ skipping 19 matching lines @@
     int score_len = static_cast<int>(score_str.length());
     return (score_len == file_util::WriteFile(oom_file,
                                               score_str.c_str(),
                                               score_len));
   }
 
   return false;
 }
 
 }  // namespace base