Change other usages of .size() to .empty() when applicable.

base/process_util_posix.cc

 // Copyright (c) 2010 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 382 matching lines @@
 
     // if found, we'll either be deleting or replacing this element.
     if (found) {
       count--;
       size -= strlen(pair) + 1;
       if (j->second.size())
         found = false;
     }
 
     // if !found, then we have a new element to add.
-    if (!found && j->second.size() > 0) {
+    if (!found && !j->second.empty()) {
       count++;
       size += j->first.size() + 1 /* '=' */ + j->second.size() + 1 /* NUL */;
     }
   }
 
   count++;  // for the final NULL
   uint8_t *buffer = new uint8_t[sizeof(char*) * count + size];
   char **const ret = reinterpret_cast<char**>(buffer);
   unsigned k = 0;
   char *scratch = reinterpret_cast<char*>(buffer + sizeof(char*) * count);
@@ skipping 567 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